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PET CT: Operation and uses of this hybrid equipment

PET CT: Operation and uses of this hybrid equipment

The PET technique CT consists of the integration of two imaging technologies in the same medical equipment: Positron Emission Tomography (PET) and Computed Axial Tomography (CT). The first PET-CT prototype was developed at the University of Pittsburgh in 1998 and its commercialization began in 2001, making it one of the first PET-CT scanners in the world. the most innovative and up-to-date equipment of the area of diagnostic imaging.

A PET CT system is a hybrid medical equipment with a stretcher and a shared medical image acquisition systemThe combination of both technologies provides a tomographic image that represents a cross-section of the organism, offering anatomical and functional information of the interior of the human body. The combination of both technologies provides a tomographic image that represents a cross section of the organism, offering anatomical and functional information of the interior of the human body.

On the one hand, the technology of Positron Emission Tomography or PET scanning provides functional and molecular information of the tissues through the use of a radiopharmaceutical. Therefore, it allows the quantification of various biochemical processes. From cellular metabolism, blood flow and protein synthesis to the analysis of different receptors. For its part, the Computed Axial Tomography or CT reports the different tissue densities generating a high-resolution anatomical image.

Thus, by combining the two techniques in a single integrated PET CT systemcan be generated anatomical and functional images simultaneously. As a result, more complete and efficient clinical diagnoses are offered, both in terms of sensitivity and specificity. Through its ability to detect functional alterations before they are visible in conventional studies, PET CT is fundamental in the early detection of diseases and in the evaluation of the effectiveness of treatments. Especially in enceological, neurological and cardiac diseases. In the following article, we analyze how it works and its main uses in clinical practice.

How does the hybrid PET CT equipment work?

The medical image acquisition protocol in a PET CT study is similar to the procedure for the standard PET technique. In a PET CT scanner, the acquisition of the study consists of three phases: the performance of a topogram, the performance of a CT study that will make it possible to determine the attenuation correction of the PET technique and, finally, the acquisition of the Positron Emission Tomography (PET). Each of these phases is discussed below:

Patient preparation

Before performing a PET CT study, the patient must be properly prepared so that the medical images obtained are of optimum quality. First of all, a radiopharmaceutical is administeredThe most widely used is Fluorine-18-labeled Fluorodeoxyglucose (18F-FDG). This compound makes it possible to detect areas of high metabolic activity that often arise in certain types of cancer, neurological and cardiac diseases. The radiopharmaceutical is administered intravenously and the patient must wait between 45 and 60 minutes for it to distribute correctly by the agency prior to the start of image acquisition.

For optimal uptake of the radiopharmaceutical, the patient must follow a series of medical recommendations:

  • Fasting for at least 4-6 hours before the study.which avoids interference with glucose metabolism.
  • Staying well hydrated before and after of the procedure.
  • Control blood glucose levelsThe high levels may affect the uptake of the radiopharmaceutical.
  • Follow instructions from physical rest before the study. Excessive movement prior to the study may generate unwanted FDG accumulation in the muscles.
  • In some cases, a controlled breathing protocol to improve the quality of the CT image.

2. Positioning of the patient in the tomograph

Once the waiting period after injection of the radiopharmaceutical is over, the patient is placed on the bed of the PET CT scanner.. To obtain high quality images and reduce errors in PET and CT image superimposition, it is essential that the patient is well aligned and comfortable. In turn, The patient is asked to extend the arms over the head. if possible, to reduce interference in the images of the thorax and abdomen. On the other hand, metal objects are removed and elements that may affect image quality.

Subsequently, the position of the stretcher is adjusted according to the area to be examined, ensuring that the body is well aligned with the CT scanner detectors. In this process, patient immobility is crucial to avoid blurred images and improve diagnostic accuracy.

3. Making the topogram

The first step in the examination of the patient is to perform a topogram with the PET CT equipment. The images are obtained using the X-rays in a fixed position, which can be anterior, posterior, lateral or in an intermediate orientation. The acquisition is performed with a continuous movement of the stretcher in a predetermined range. In this way, a anatomical image similar to an X-ray projectionwhere the different internal structures and tissues can be analyzed.

It is important that during the procedure the equipment is adjusted and the limits of the PET CT study are defined. Depending on the model of the CT scanner, the fields of view and image formation may be different for different techniques. Therefore, it is necessary to verify that all body parts are within the image with the smallest field of viewwhich are normally those of the CT scan.

4. Elaboration of the TAC study

Once the field of view of the PET CT study has been defined, the patient's stretcher is automatically mobilized to start the CT diagnosis. In the test, a specific breathing protocol is introduced to match the CT and PET image, since the latter is acquired with normal breathing by the patient.

The duration of the CT study depends on various parameters: the extension of the area to be scanned, the rotation speed of the tube and the translation of the stretcher. CT allows detailed anatomical images to be obtained through the use of X-rays, which facilitates the precise localization of organs and structures. In some cases, a contrast medium may be administered to enhance the visualization of vascular structures or specific lesions.

Regarding its duration, a full body CT study using the hybrid equipment is less than one minute. This is because the images obtained are used for attenuation correction in the PET study, which significantly reduces the acquisition time. In PET equipment, when germanium (Ge) sources are used, the CT procedure time amounts to 20 to 30 minutes. With this, radiation exposure is reduced and the patient experience is improved.

5. Acquisition of the PET study

After the CT analysis, PET images are acquired, in which the metabolic data of the tissues are captured. For this purpose, the couch is moved to position the patient in the field of view of the PET scanner, encompassing different positions on the stretcher to cover the region of interest to be analyzed. All these areas are the ones that cover the range explored by CT.

The acquisition time of the PET study can range from between 10 and 30 minutes. This depends on the stretcher positions, the range scanned, as well as the equipment used. During this phase, the areas of the body with abnormal metabolic activity are highlighted on the PET imageThis makes it possible to detect tumors, infections or neurological problems with great precision.

6. PET CT image reconstruction

Reconstruction is performed in parallel to image acquisition.This allows results to be obtained in just a few minutes. This step is essential to generate highly accurate fused images, combining the metabolic information from PET with the detailed anatomical structure from CT.

In this process, the reconstruction time of each CT slice is less than one second.The PET images are reconstructed and available for analysis at the end of the acquisition of the last couch position. To achieve this, we use the reconstruction algorithms available in PET tomographs with the scatter and attenuation corrections determined from CT images.

7. Image analysis and interpretation

Once the images have been reconstructed, they are analyzed, where specialists can analyze different types of medical images:

  • PET images without correctionThey show the uptake of the radiopharmaceutical in the body.
  • Corrected PET imagesThey incorporate attenuation adjustments to improve accuracy.
  • CT imagesThey offer anatomical details of the explored region.

The image fusion software allows the superimposition of PET and CT information, facilitating the exact localization of lesions and their subsequent analysis and interpretation.

What is PET CT used for?

It is a diagnostic technique that is essential in different medical specialties:

  • OncologyEarly detection of tumors, evaluation of metastases and treatment follow-up.
  • NeurologyIt is used for the diagnosis of diseases such as Alzheimer's, Parkinson's and epilepsy.
  • CardiologyThey play an essential role in the evaluation of blood flow and the detection of lesions and abnormalities in the heart.
  • Immunology and infectionsHelps in the identification of inflammatory processes and infectious diseases.
Uses of PET CT equipment

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Clinical applications of PET CT

PET CT technology combines the advantages of an anatomical and a functional imaging technique. In the current medical context, the use of this hybrid equipment is used in the following cases:

To confirm or rule out a malignant tumor pathology.

The PET technique can to analyze whether a lesion is benign or malignantThis can avoid the need for biopsies and other invasive diagnostic tests. In turn, it allows early detection of tumor processes, before anatomical changes occur that can be detected by morphological imaging techniques.

Determine tumor extent

It has the ability to perform whole body studieswhich makes it possible to rule out or confirm other malignant lesions concurrent with the primary tumor.

Detecting new tumor recurrences

Through this technique, it is possible to differentiate between malignant processes and new tumors that arise recurrently. This can be used to optimize patient treatment planning.

Assess response to treatment

The metabolic changes produced before an adequate response to chemotherapy are observed earlier in PET imaging than in other techniques. diagnostic imaging. Therefore, this type of medical imaging is an early indicator of tumor response. Their use helps to determine the continuation of certain treatments or, on the contrary, their interruption.

The use of hybrid PET-CT equipment is a crucial advance in medical diagnostics. It combines a functional and anatomical analysis of the inside of the human body in a single medical device, making it fundamental in the early diagnosis of cancer and other neurological and cardiological diseases. The combination of technology and medicine continues to save lives, and the PET CT technique is a clear example of this.

Bibliography

Instituto de Salud Carlos III (n.d.). PET/CT Image Acquisition and Processing Handbook. REPISALUD. Retrieved February 13, 2025, from https://repisalud.isciii.es/rest/api/core/bitstreams/5a1cd1bb-f736-4746-aa8c-0cc3a0a7a274/content

Medigraphic (2005). Acta Médica Article. Retrieved February 13, 2025, from https://www.medigraphic.com/pdfs/actmed/am-2005/am053e.pdf

Electronic Journal of University Medical Science (n.d.). Article in RECIAMUC. Retrieved February 13, 2025, from https://www.reciamuc.com/index.php/RECIAMUC/article/view/1326/2074

Medigraphic (2014). Acta Médica Article. Retrieved February 13, 2025, from https://www.medigraphic.com/pdfs/actamedica/acm-2014/acm141i.pdf

Martínez del Valle, M. (2016). PET-CT: Physical basis, instrumentation and technological advances. Radiology, 58(5), 377-389. Elsevier. Retrieved from https://www.elsevier.es/es-revista-radiologia-119-articulo-pet-tac-bases-fisicas-instrumentacion-avances-S0033833816301801?newsletter=true

Spanish Society of Nuclear Medicine and Molecular Imaging (SEMNIM). (2019). PET-CT protocol. SEMNIM. Retrieved February 13, 2025, from https://www.semnim.es/wp-content/uploads/2019/07/79.pdf

Luis Daniel Fernandez Perez

Director of Diagximag. Distributor of medical imaging equipment and solutions.

What is positron emission tomography or PET?

What is positron emission tomography or PET?

The positron emission tomography (PET) scanning is the technique of diagnostic imaging more recent and modern. It is a nuclear medicine procedure that emerged in the 1970s in the United States and was introduced in Spain in 1995. To perform a positron emission tomography scan, a radioactive material, called a radiopharmaceutical, is administered intravenously and the diagnosis is then made using specific equipment: the PET scanner.

This medical device is equipped with a special camera that allows visualization of internal organs at the molecular and cellular leveloffering information on metabolic activity of the body's tissues. From the analysis of blood flow, oxygen consumption, glucose and protein metabolism, amino acid transport and cell division to the detection of biochemical changes.

In the PET technique, radioation is detected after administration of the radiopharmaceutical. To do this, you need a waiting time between 30 and 60 minutes for the substance to take effect and be distributed correctly throughout the patient's body. This diagnostic imaging test is used for to develop a metabolic study of the interior of the organismIt therefore provides a complement to the anatomical information offered by procedures such as computed tomography (CT) or magnetic resonance imaging (MRI).

One of the most recent advances in this area has been the development of hybrid equipment that combines two technologies in the same medical equipment. In 1998, the CT scanner began to be used in clinical practice. PET CTa device that incorporates the PET technique together with CT. A year earlier, in 1997, the hybrid PET MRI device was created by Mardsen and Cherry, which combines the anatomical images provided by MRI with the biochemical data from PET. However, it was not until 2009 that Phillips developed the first integrated system.

Currently, the use of positron emission tomography (PET) has made it possible to diagnose diseases in their earliest stages and, in turn, analyze the patient's response to specific treatments. Its ability to analyze functional changes before structural damage occurs in the body makes it key in the diagnosis and monitoring of multiple pathologies, especially in oncology, neurology and cardiology.

In the following article, we will analyze what this diagnostic technique consists of and the medical equipmentThe advantages and disadvantages, as well as their applications in clinical practice.

How does PET positron emission tomography work?

The positron emission tomography diagnosis consists of a process made up of different stages, which we analyze below:

Administration of the radiopharmaceutical

The first step in a PET study is the administration of a radioactive substancecalled radiopharmaceutical or radiotracer. This compound is generally introduced into the body intravenously, although in some cases it can be administered by inhalation or orally.

The most commonly used PET radiopharmaceutical is fluorodeoxyglucose (FDG). It consists of a glucose-like molecule that is labeled with fluorine-18, a radioactive isotope. The main reason for using FDG is that cells with high metabolic activity, such as cancer cells, consume more glucose than normal tissues. This allows the radiopharmaceutical to accumulate in areas of higher cellular metabolism, facilitating its detection.

2. Distribution and waiting

After administration of the radiopharmaceutical, the patient must remain at rest for 30 to 60 minutes for the substance to be adequately distributed throughout the body. During this time, it is recommended that the patient remain calm and avoid talking or moving excessively, since muscular activity could alter the uptake of the radiotracer and affect the quality of the images.

3. Patient positioning

Once the radiopharmaceutical has been absorbed by the tissues, the patient is placed on a sliding stretcher which introduces it into the PET scanner.. This equipment consists of a ring of detectors that surrounds the patient and is capable of recording the radiation emitted by the radiopharmaceutical. The procedure has a duration between 15 and 45 minutesdepending on the type of study to be performed.

4. Diagnosis by PET scanner

The radiopharmaceutical injected into the patient emits positrons.which collide with the body's electrons, generating two gamma photons in opposite directions. The PET scanner detectors capture these gamma photons and record the exact location of each emission. Subsequently, the medical team is responsible for the reconstruction of a tomographic image detailed with the areas where the radiopharmaceutical has accumulated, reflecting the metabolic activity of tissues and organs.

5. Image processing and reconstruction

Once the data has been collected, specialized software processes the information and generates three-dimensional images of the distribution of the radiopharmaceutical in the patient's body. These images show the areas of increased metabolic activity (hyper uptake) in brighter colorswhile areas with lower metabolism appear in darker shades. This activity map allows physicians to accurately identify anomalies such as malignant tumors, neurodegenerative diseases or cardiac conditions.

6. Analysis and interpretation of results

Finally, specialists in radiology or nuclear medicine analyze the images. obtained to make a diagnosis. Depending on the case, the PET scan can be combined with other imaging techniquesas the computed tomography (CT) or the magnetic resonance imaging (MRI)as well as the use of hybrid equipment. This will provide a more complete view of the anatomy and function of the organs.

Learn how the PET technique works

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Positron emission tomography advantages

Positron emission tomography (PET) is a highly advanced imaging technique with the following benefits:

Early detection of diseases

Allows you to identify metabolic abnormalities before visible structural changes occur in other imaging tests, which facilitates the early diagnosis of diseases. These include cancer, Alzheimer's disease and heart disease.

Real-time functional evaluation

In contrast to computed tomography (CT) or magnetic resonance imaging (MRI), which only analyze anatomy, PET provides information on how tissues and organs function at the cellular and molecular level.

Effective technique to detect cancer and metastases

PET is one of the most effective tools for the detection and localization of cancer and its metastasesThis allows us to know the extent of the disease and to plan the appropriate treatment.

Monitoring treatment response

This is a diagnostic technique used for evaluate how a patient is responding to chemotherapy, radiotherapy or immunotherapy treatments. In this way, it makes it possible to make adjustments to the therapeutic strategy in real time.

Combined technology for greater precision

The use of hybrid equipment allow both anatomical and functional information to be obtained at the same time. At present, PET-CT and PET-MRI equipment offer the most advanced benefits of using two techniques in a single study. Its use helps to improve diagnostic accuracy and radiation dose reduction received by the patient by up to 50 %.

Disadvantages of positron emission tomography

However, it also has a number of limitations that are important to analyze:

Exposure to ionizing radiation

The PET technique uses radioactive radiopharmaceuticals that expose the patient to ionizing radiation. Although its doses are low and safe, the amount of radiation increases significantly when using various diagnostic techniques.

High cost and limited availability

It is a expensive technique because of the need for specialized equipment and the use of radiopharmaceuticals. These substances require rapid distribution in order not to lose effectiveness. Therefore, one of their disadvantages is that they limit availability in certain hospitals and regions.

Waiting time and duration of the study

Before performing the PET scan, patient must wait 30 to 60 minutes after injection of the radiopharmaceutical. Thus, in comparison with other diagnostic techniques, waiting time increases the duration of the test.

Complex interpretation of images

Medical images obtained can be difficult to interpret.not all elevated glucose uptake indicates abnormalities. Therefore, alternative tests are required for a more accurate diagnosis.

Clinical uses and applications

Positron emission tomography is used in different medical specialties, specifically in oncology, neurology and cardiology. What are its main uses in clinical practice?

Oncology

  • Early detection of malignant tumors.
  • Identification of metastases and evaluation of cancer spread.
  • Assessment of the response to treatment with chemotherapy or radiotherapy.
  • Differentiation between benign and malignant tumors.

Neurology

  • Early diagnosis of neurodegenerative diseases such as Alzheimer and Parkinson.
  • Localization of epileptic foci in patients with treatment-resistant epilepsy.
  • Evaluation of psychiatric illnesses and neurocognitive disorders.

Cardiology

  • Determination of cardiac muscle viability in patients with myocardial infarction.
  • Evaluation of blood flow and cardiac function in ischemic diseases.

Other medical applications

  • Diagnosis of endocrine diseases, such as adrenal gland disorders.
  • Detection of infections and chronic inflammatory diseases.
  • Evaluation of gastrointestinal pathologies with metabolic involvement.

After analyzing the operation of positron emission tomography (PET), we can highlight that it is a fundamental tool in nuclear medicine to detect diseases in their early stages and evaluate the metabolic function of different organs and tissues.

Bibliography

Acta Médica Grupo Ángeles (2005). Positron emission tomography in oncology. Retrieved from https://www.medigraphic.com/pdfs/actmed/am-2005/am053e.pdf

Acta Medica Group Angeles (2014). Use of Positron Emission Tomography (PET) in neurology. Retrieved from https://www.medigraphic.com/pdfs/actamedica/acm-2014/acm141i.pdf

Spanish Agency of Medicines and Health Products (AEMPS). (2007). PET Radiopharmaceuticals: Regulatory and Safety Considerations. Retrieved from https://www.aemps.gob.es/eu/publicaciones/articulo/docs/radiofarmacosPET_oct07.pdf

Spanish Society of Nuclear Medicine and Molecular Imaging (SEMNIM). (2019). Clinical applications of positron emission tomography. Retrieved from https://www.semnim.es/wp-content/uploads/2019/07/69.pdf

Author unknown (2018). Advances in the use of PET in oncology. Oncology (Spain), 27(8), 7-13. Retrieved from https://scielo.isciii.es/pdf/onco/v27n8/02.pdf

Carlos III University of Madrid (2002). Development and evaluation of radiopharmaceuticals in positron emission tomography. e-Archivo UC3M. Retrieved from https://e-archivo.uc3m.es/rest/api/core/bitstreams/e86f7bc6-a0e4-4b81-8886-7fbca138817b/content

Nuclear Safety Council (CSN). (n.d.). PET-RM: A revolutionary alliance. CSN. Retrieved from https://www.csn.es/-/pet-rm-una-revolucionaria-alianza#:~:text=El%20PET%2DRM%20naci%C3%B3%20en,desarroll%C3%B3%20el%20primer%20sistema%20integrado.

Luis Daniel Fernandez Perez

Director of Diagximag. Distributor of medical imaging equipment and solutions.

The importance of radioprotection in the clinical environment

The importance of radioprotection in the clinical environment

The radioprotection is the set of measures, standards and practices aimed at protecting people, the environment and the surroundings from the harmful effects of ionizing radiation. In the clinical setting, the aim of radiation protection is to ensuring the safe use of radiation for diagnostic and therapeutic procedures for patients and healthcare personnel, minimizing the associated risks.

What is radioprotection?

The ionizing radiation is a fundamental tool in modern medicine. It is used in procedures of diagnostic imaging that use X-rays, such as conventional radiography, digital radiology, fluoroscopy, computed tomography (CT) and interventional radiologyRadiology, a branch of radiology that diagnoses and treats various pathologies by means of minimally invasive procedures. In turn, it is also used in radiotherapy treatmentsThe aim of this program is the destruction of tumor cells and tissues by means of radiation, and in the nuclear medicine.

However, its improper or excessive use can have harmful consequences for people's health.. These include tissue damage or increased risk of cancer in the long term. For this reason, it is of great importance in the clinical environment and requires a sound management. In this sense, the discipline of Radiation ProtectionThe company, which employs professionals such as physicists, physicians, biologists and engineers, is working to ensure that the development and application of technologies that use ionizing radiation are safe.

Basic principles of radiation protection

The Radiation Protection System is based on three fundamental principles that have been established by the International Commission on Radiological Protection (ICRP):

1. Justification

Any procedure involving the use of ionizing radiation must be medically indicated. This means that the benefits of the procedure must clearly outweigh the risks associated with radiological exposure.

2. Optimization (ALARA Principle)

Exposure should be kept "as low as reasonably achievable". This principle is referred to as ALARA and ensures that the lowest dose necessary to obtain clinical results is used.

3. Dose limitation

Strict dose limits must be established to protect both healthcare personnel and patients, preventing exposure from exceeding levels considered safe. This principle is oriented to the protection of persons exposed to radiation sources.

Application of the Radiological Protection System in the clinical environment.

In the clinical environment, the Radiation Protection System is implemented through a structured approach that includes the following aspects:

Design and maintenance of installations

The rooms of X-raysCT scans, CT scans or TAC and radiotherapy must be equipped with adequate shielding that minimizes radiation scattering. In turn, it is essential to carry out periodic inspections to guarantee the correct functioning of medical equipment and that they do not emit an unnecessary dose of radiation.

Equipment quality control

The following must be implemented preventive maintenance and calibration programs to ensure that the equipment operates efficiently within the established limits. Another key aspect is incorporate advanced technologies that allow automatic adjustment of radiation doses according to the patient's characteristics. To this end, digital radiology medical equipment will make it possible to optimize the amount of radiation, increasing safety in the healthcare environment for both medical staff and patients.

Staff training

One of the strategies to promote radioprotection in the clinical setting is to to train health professionals on the safe use of medical equipment that emit ionizing waves and which, in turn, have knowledge of the three principles of radioprotection. In this way, through appropriate training, it will be possible to promote the development of a safety culture to ensure the application of good practices in daily work in the health sector.

Radiation protection measures

Radiation protection in the clinical environment is essential to ensure the safety of patients and healthcare personnel from the risks associated with ionizing radiation. To this end, various strategies and tools designed to minimize unnecessary exposure are implemented, respecting the principles of justification, optimization and dose limitation.

Protection of healthcare personnel

Personnel working in areas where ionizing radiation is used must be adequately protected to avoid cumulative exposure that may pose a long-term risk. Key measures include:

  • Personal Protective Equipment (PPE)Professionals should wear leaded aprons, thyroid protectors, leaded goggles and gloves that are specifically designed to reduce direct exposure to radiation.
  • Dose monitoringIt is mandatory for health personnel to record the amount of radiation accumulated. This monitoring ensures that the dose does not exceed the limits established by the regulations in force.
  • Staff turnoverTo minimize exposure time, personnel rotation is organized in tasks involving the handling of radiation-emitting equipment. In this way, the exposure load is evenly distributed.

Patient protection

Patients should also be protected from unnecessary radiation exposure, especially considering that they are often exposed in a timely manner but with high doses in some diagnostic or therapeutic procedures. The most relevant measures are:

  • CollimationIt is essential to limit the area of the body that is exposed to radiation by using collimation systems that focus the radiation beam only on the area of interest. This reduces the amount of tissue irradiated and thus the associated risks.
  • Optimized protocolsModern equipment makes it possible to adjust the exposure parameters (such as energy and radiation time) according to the specific characteristics of each patient. This makes it possible to deliver a minimum dose without compromising the quality of the radiation dose. medical images or treatment.
  • Repetition controlTo avoid unnecessary repetitions of radiological studies, it is essential that the staff is well trained and that the equipment is functioning optimally. This ensures that the images obtained are of diagnostic quality on the first attempt.

Signaling and delimitation of areas

Facilities using ionizing radiation must have proper signage and access control to protect those not involved in the procedures. These measures include:

  • SignageVisible signs should be posted indicating radiological risk areas and exposure levels, warning people of the need to wear appropriate protection or to avoid entry.
  • Delimitation of areasIonizing radiation: Access to areas where ionizing radiation is used should be restricted. Its use should be limited to authorized personnel, thus avoiding accidental exposure of third parties or the general public.

In conclusion, radiation protection in the clinical setting is a shared responsibility that requires the collaboration of professionals, patients and regulatory bodies. Applying protection principles and measures not only ensures safety, but also improves the quality of medical care.

Bibliography

Nuclear Safety Council (CSN). (n.d.). Radiation protection in the healthcare environment. Retrieved from https://www.csn.es/documents/10182/914805/La+protecci%C3%B3n+radiol%C3%B3gica+en+el+medio+sanitario

Clínica Universidad de Navarra (CUN). (n.d.). Radioprotection. Medical dictionary. Retrieved from https://www.cun.es/diccionario-medico/terminos/radioproteccion

Kiko Ramos

CEO of 4D Médica. Expert in marketing and distribution of medical equipment.

Parts of a mammography machine, operation and advantages

Parts of a mammography machine, operation and advantages

The mammography is a technique of diagnostic imaging which uses a system of low-dose X-rays to examine the inside of the breasts. This is a medical test that consists of performing a breast radiography. When performing a mammogram, a mammography machine is used. specific equipment: the mammograph. It is a medical equipment that is specifically designed to capture X-ray images with a high resolution to detect signs and irregularities in breast tissue. The design and the different parts of a mammography equipment allow using a minimum dose of radiation during the test, making it an effective, fast and safe examination.

Health professionals use this test to look for early signs of disease in breast tissue. Among them, breast cancer. The mammography test is called mammogram and its main purpose is to detect abnormalities such as tumors, cysts or microcalcifications in the breast. We analyze, below, what mammography consists of, how the mammogram works and its different parts.

 

Mammography: What is mammography and types of mammograms?

The use of the mammograph is used as a screening tool for early detection of breast cancer in womenA mammogram is used both in women who have no symptoms and to diagnose the presence of abnormalities in women who notice breast irregularities. A mammography examination or mammogram exposes the woman to a small dose of ionizing radiation to generate medical images of the inside of the breasts. We can differentiate between two types of mammography:

Screening mammography

A screening mammogram is performed in women who have no signs or symptoms of breast cancer. This type of mammography should be performed periodically in women from the age of 40 as a form of prevention. By means of this diagnostic test, it is possible to detect irregularities in the breast tissue, such as tumors, cysts or microcalcifications. Screening for breast disease at early stages, especially breast cancer, provides a range of advantages:

  • Allows the identification of tumors before they are palpable. or present visible symptoms.
  • Enables treatment to be initiated in the early stagesbefore the disease has spread.

According to different studies, it has been proven that the screening mammography screening decreases breast cancer morbidity rates by detecting the disease at treatable stages, increasing the chances of successful treatment.

2. Diagnostic mammography

Diagnostic mammography is used when a woman presents symptomsas lumps, pain, discharge or changes in the skin of the breast. It is also used when an abnormality is detected on a screening mammogram or detection. This type of examination allows the affected area to be studied in greater detail and thus identify whether the breast condition is benign or malignant.

 

Mammograph operation

The medical equipment The mammogram is a specialized medical device that allows the analysis of breast tissue and the presence of abnormalities. This is specialized medical equipment that uses X-rays to generate medical images of the inside of the breasts. How a mammogram works consists of several stages:

Preparation of the patient

The process begins with the positioning of the patient in front of the mammograph. During the mammogram, a radiology professional will positions the breast on a flat platform of the mammography equipmentwhere the breast will be gradually compressed. The specialized technician will guide the patient to ensure proper posture and perform the medical test.

2. Breast compression

Once the breast is positioned, an adjustable compressor descends to press on the breast tissue gently, but firmly.

3. X-ray emission

The tube of X-rays of the mammogram emits a controlled beam of radiation passing through compressed breast tissue. This radiation is absorbed to a greater or lesser extent depending on the density of the tissue:

  • The dense tissuessuch as tumors or microcalcifications, absorb more radiation. They appear clearer and brighter in the images.
  • On the other hand, the fatty tissues absorb less radiation and appear darker.

4. Image capture

The radiation passing through the breast is captured by a detector which transforms the data into a digital image or radiographic film. Modern mammographs are often equipped with digital technology that allows images to be stored and processed on a computer.

Subsequently, these generated medical images can be integrated in the RIS system to automate the management of medical imaging data and information, facilitating its analysis and comparison with previous studies.

5. Variation of angles and views

To ensure a complete evaluation of the breast tissue, images are captured from different angles. The different perspectives help physicians identify abnormalities that may not be visible in a single view. The views that are analyzed in a mammography study are:

  • Craniocaudal (CC)This is a top-down view.
  • Mediolateral oblique (MLO)This type of slanted view allows a greater amount of breast tissue to be studied, especially that close to the axilla.

6. Image analysis

Once the images have been obtained, a specialized radiologist reviews the results for possible abnormalitiesas cysts, calcifications, tumors or suspicious tissue changes. Nowadays, digital images offer many advantages, since they allow adjusting contrast and brightness to improve image quality, obtaining a more efficient and accurate diagnosis.

 

The mammograph: Parts and components

A mammogram is composed of several elements that work together to ensure clear and accurate images. Each component has a specific function that contributes to the quality of the diagnosis and the safety of the procedure. What are the main parts of a mammography machine?

X-ray tube

The X-ray tube is the component responsible for generating the X-ray beam that passes through the breast tissue. and subsequently produce high quality images. The mammograph uses a lower radiation doses than standard X-rays. This is because, since x-rays do not pass through this area easily, the mammography equipment is designed with two plates that compress and flatten the breast to separate the breast tissue. In this way, a higher quality medical image can be created and the amount of radiation during the exam can be reduced.

2. Compressor

The compressor is a movable plate that descends to press the breast against the mammography platform. Its function is to compress the breast tissue gently and firmly, providing the following advantages:

  • Reducing the thickness of breast tissue to improve the visualization of internal structures.
  • Minimizing X-ray scatteringThe image quality is improved.
  • Avoid blurred images caused by the involuntary movement of the patient.
  • Allowing the use of a lower dose of radiationmaking the procedure safer.

3. Support platform

The support platform is a flat surface on which the breast is positioned during mammography. It provides a stable and firm foothold, ensuring that the breast tissue is correctly positioned for sharp, detailed images.

4. Detector

The detector is the component that captures the radiation passing through the breast tissue and converts it into an image.. Depending on the type of mammograph, it can be of different types:

  • DigitalX-ray: Converts X-rays into electronic data that is processed and stored in a computer, facilitating detailed and rapid analysis.
  • Radiographic filmThis type of detector is used in analog mammographs, where the image is printed on a special film.

5. Collimator

The collimator is a structure that directs and confines the X-ray beam to the specific area of the breast that needs to be examined. This component prevents other areas of the body from receiving unnecessary radiation, making the procedure safer.

6. High voltage generator

The high-voltage generator is responsible for supplying the energy necessary for the X-ray tube to function correctly. It regulates the intensity and duration of the X-rays, adapting to the needs of each scan.

7. Control station

The control station is the panel or computer from which the technician operates the mammography machine. Allows you to adjust the parameters of the examinationIt also ensures that the procedure is performed in a precise and customized manner for each patient. It also ensures that the procedure is performed accurately and customized for each patient.

8. Positioning system

The positioning system includes mechanisms for adjusting the height, tilt and angle of the mammography machineThe system can be adapted to the physical characteristics of each patient. This system facilitates the imaging from different perspectivesobtaining a complete analysis of the breast tissue.

9. Image processing software

In digital mammographs, the digital mammogram processing software medical images is an advanced tool that improves the quality of captured images. Allows adjustment of contrast, brightness and other parameters to highlight specific details, as well as compare current images with previous studies, facilitating a more accurate diagnosis.

10. Security system

The mammogram is equipped with a safety system that ensures that radiation exposure is minimized and safe for the patient. In addition, some devices are equipped with sensors that automatically stop the process if a problem is detected technical or positioning.

 

Advantages of mammography

The mammograph is an essential medical device for the detection, diagnosis and follow-up of breast diseases, especially breast cancer. Its use not only allows early identification of abnormalities, but also contributes to more effective treatment planning. What are its main advantages?

Prevention and early detection of diseases

The mammograph is capable of identify abnormalities in breast tissue in early stages or even before symptoms and signs are visible. The early detection is key to significantly increasing the chances of successful treatment, as it allows the disease to be addressed before it develops to an advanced stage.

In turn, the periodic mammograms are performed is a fundamental strategy for the prevention of breast cancer in women. By detecting breast cancer in its early stages, it helps to reduce the mortality associated with this disease and improves the quality of life of patients.

Non-invasive, fast and safe procedure

Mammography is a non-invasive diagnostic procedure that uses a minimal dose of X-rays, meeting strict safety standards. The mammography exam is fast and efficient. It usually has a duration between 10 and 30 minutesdepending on the type of mammography performed:

  1. The screening mammogramsDuration: Its duration is between 10 and 20 minutes.
  2. The diagnostic mammogramsThey have a longer life, between 15 and 30 minutesThey include different views and images to analyze the area in a specific way.

High precision imaging

Modern mammographs, especially digital mammographs and those using 3D technology (tomosynthesis), provide high-resolution images that allow the breast tissue to be analyzed in great detail. This precision facilitates the detection of small or subtle irregularities and improves the differentiation between normal tissues and abnormalitiesreducing the probability of false positives or negatives.

Examination customization

The design of the mammograph allows tailoring the procedure to the individual characteristics of each patient. Exposure parameters, X-ray intensity, acquisition angle and compression level can all be adjusted. All this allows you to generate high quality medical images and optimize the patient experience.

Fast and efficient diagnostics

The mammogram streamlines the diagnostic process by generate medical images in a short period of time. In this way, when abnormalities are detected, physicians can immediately plan further studies and start treatment as soon as possible.

Multiple uses and clinical applications

In addition to being a key tool for the early detection of breast cancer, the mammogram has also other important applications:

  • Monitoring of the evolution of oncological treatments.
  • Performing image-guided biopsiesThis improves the accuracy of the procedure.
  • Identification of benign changes or non-malignant disease in the breast tissue.

In summary, the mammograph is an advanced technological tool that combines precision, safety and efficiency for the detection and diagnosis of breast disease.

Bibliography

American Cancer Society (n.d.). Mammogram basics. Retrieved January 15, 2025, from https://www.cancer.org/es/cancer/tipos/cancer-de-seno/pruebas-de-deteccion-y-deteccion-temprana-del-cancer-de-seno/mamogramas/conceptos-basicos-del-mamograma.html

RadiologyInfo.org (n.d.). Mammography. Retrieved January 15, 2025, from https://www.radiologyinfo.org/es/info/mammo

MedlinePlus (n.d.). Mammography. U.S. National Library of Medicine Retrieved January 15, 2025, from. https://medlineplus.gov/spanish/mammography.html

Centers for Disease Control and Prevention (CDC). (n.d.). Mammograms. Retrieved January 15, 2025, from https://www.cdc.gov/breast-cancer/es/about/mammograms.html

Revista Argentina de Mastología (2020). Importance of mammography in the early detection of breast cancer. Retrieved January 15, 2025, from https://www.revistasamas.org.ar/revistas/2020_v39_n141/06.pdf

Luis Daniel Fernandez Perez

Director of Diagximag. Distributor of medical imaging equipment and solutions.

Functions, uses and parts of a C Arc

Functions, uses and parts of a C Arc

 

The arc in C is specialized medical equipment used in radiology and interventional procedures to obtain real-time X-ray images of the inside of the human body. It is a mobile device that enables radiological and fluoroscopic imaging. Its name derives from its C-shaped structure"which allows a wide range of movements and the acquisition of images from multiple angles and positions for capture specific anatomical views without moving the patient.

It is used to obtain X-ray and fluoroscopic images without having to move the patient to the radiology department. Therefore, diagnostics and procedures can be performed at the patient's hospital bedside or on the operating table during surgery. Its use is essential in areas such as surgery, orthopedics, traumatology, cardiology, neurology, urology and minimally invasive procedures.

Among the main advantages offered by the arc in Cis that facilitates diagnosisoffers a high precision and safety, y decreases the duration of surgical interventions in which the patient is under general anesthesia. In the following article, we analyze how a C-arm works, its parts, functions and main applications and uses. medical equipment.

 

How does a C-arc work?

The operation of a C-arc is the same as that of the X-ray machines conventional. Combine two main elements that work in an integrated manner How does this process work?

X-ray generator

The process begins with the X-ray tubelocated at one end of the "C" arm. This component emits a beam of radiation which passes through the patient's body. Collimators, which are adjustable devices on the tube, delimit the radiation field, ensuring that only the area of interest is irradiated. This not only improves image quality, but also minimizes radiation exposure to other areas.

When the X-ray beam passes through the patient's body, interacts with the different tissuesgenerating a phenomenon called differential absorption. The Denser tissues, such as bones, absorb more radiation. and are represented as white areas in the image. On the other hand, the soft tissues and air-filled areas allow the rays to pass through more easily, appearing in gray or black tones. This difference in absorption is what creates the contrast in radiological images.

Image detector or intensifier

At the opposite end of the X-ray tube is the image detector or intensifier. This component receives the rays that have passed through the patient and converts them into electrical signals. Modern detectors, called digital flat panel detectors, process these signals to generate high-resolution images. This advance has largely replaced traditional intensifiers, offering greater sharpness and less radiation exposure.

The signals captured by the detector are sent to a processing system that converts the data into digital images.. This software automatically optimizes parameters such as contrast, brightness and sharpness to ensure that images are clear and easy to interpret. These images are displayed in real time on monitors connected to the system, allowing the medical team to observe the area of interest while the procedure is being performed.

 

C-arc: Parts and functions

The C-arm in radiology consists of several parts that work together to provide high quality images in real time during medical procedures. Below are its main components and functions:

Part Description
C-shaped arm Central structure connecting the X-ray tube to the detector.
X-ray tube Located at one end of the C-arm, it emits the radiation beam.
Image detector At the opposite end of the X-ray tube, it captures the radiation passing through the patient.
Mobile base Wheeled structure that supports the equipment and facilitates its transport.
Control panel Operational console from where the equipment parameters are adjusted.
Monitors Screens connected to the image processing system.
Collimator system Adjustable device located in the X-ray tube.
Cooling system Components that dissipate the heat generated by the X-ray tube.

Detailed picture of the parts of a C-arc

Parts of a C-arc

1. "C" shape arm

It is the main structure that connects the essential components of the equipment, such as the X-ray tube and the imaging detector.

Functions:

  • The C-shaped arm connects the X-ray tube, which is located at one end, to the image detector or intensifier, which is located at the opposite end, allowing a wide range of movement around the patient.
  • Facilitates imaging from multiple angles no need to move the patient.
  • Includes rotations in multiple planes: horizontal, orbital and verticalThis makes it possible to adapt to different types of procedures.

X-ray tube

This is the radiation generator located at one end of the C-arm.

Functions:

  • Emits X-rays through the patient's body.
  • Its intensity and duration are controlled to obtain quality images. while minimizing radiation exposure.
  • Security is a key aspect in the use of the C-arm. These devices are designed to minimize radiation exposure for both the patient and the medical staff. They have specific systems that reduce scattered radiation and integrated dosimeters continuously monitor the delivered dose.

3. Image intensifier or digital flat detector

It is located on the opposite side of the X-ray tube, capturing the radiation passing through the patient.

Functions:

  • Converts X-rays into visible images in real time.
  • The state-of-the-art digital flat panel detectors offer higher resolution images and lower radiation exposure compared to traditional intensifiers.

4. Control Console

This is the external control panel operated by the radiological technician during diagnosis.

Functions:

  • Allows adjustment of exposure parametersThe company has a wide range of products, such as time and intensity, among other aspects.
  • Controls the movement of the arc and the orientation of the images.
  • Saves and transmits the images obtained for further analysis. The data is stored in a PACS system (Picture Archiving and Communication System), allowing quick and easy access for further analysis.

3. Monitor

The C-arm includes one or more high-resolution monitors, usually in Full HD, which allow physicians to view images in real time during procedures. This screen is connected to the system, usually located near the surgical field.

Functions:

  • Displays radiological and fluoroscopic images in real time so that physicians can be guided through the procedure.
  • Some systems include dual monitors to compare images in real time with previous analyses.

6. Mobility system

It is a rolling base with lockable wheels or fixed support system on larger models.

Functions:

  • Facilitates C-arm transport between different areas of the hospital.
  • Allows you to position the equipment in a stable and safe manner around the patient.

7. Power generator

It provides the power needed to operate the X-ray tube and other system components.

Functions:

  • Regulates the power supply to ensure consistent performance during use.

8. Image processing software

By means of a radiodiagnostic softwareThe computerized system manages the acquisition, processing and storage of medical images.

Functions:

  • Improved image quality through techniques such as contrast adjustment and noise reduction.
  • Allows measurements and annotations directly on the images.

9. Collimator system

It is the device located in the X-ray tube that is responsible for controlling the irradiated area to be analyzed or treated.

Functions:

  • Adjusts the radiation field to focus only on the area of interest.
  • Reduces unnecessary radiation exposure for both the patient and the medical staff.

10. Refrigeration system

The cooling system is the mechanism for dissipating the heat generated by the X-ray tube.

Functions:

  • Maintains equipment temperature within safe operating limits.
  • Prolongs X-ray tube lifetime.

 

Clinical uses and applications of a C-arm in radiology

The C-arm is a medical device widely used in radiology and interventional medicine due to its ability to generate real-time images with high precision. What are its main uses and clinical applications?

Orthopedic surgery

In the field of orthopedic surgery, the C-arm is essential for the precise placement of screws, intramedullary nails and plates used in orthopedic surgery. fracture treatment. It is also used for guiding fracture reduction or deformity correction procedures. Its ability to provide clear, real-time images allows the surgeon to visualize bone structures and ensure that implants are positioned correctly, reducing the risk of errors during surgery.

Spine surgery

In spinal interventions, the C-arm facilitates the precise placement of the fixation devices such as pedicle screws and spinal fusion brackets. In turn, it is also used in procedures such as the vertebroplasty. The real-time images it generates are crucial to avoid injury to sensitive nerve structures and to ensure a successful outcome.

Interventional radiology

The C-arm is an essential tool in interventional radiology, where it is used for guided procedures such as biopsies, drains and tumor ablations. It is also indispensable in angiographieswhere digital subtraction imaging (DSA) allows high-precision visualization of blood vessels. This equipment facilitates minimally invasive procedures, which require detailed, real-time imaging to ensure accurate results.

Interventional cardiology

In cardiology, the C-arc is used in procedures such as coronary angiographieswhich evaluates the circulation in the arteries of the heart. It is also key to the implantation of pacemakers and other cardiac devices. Thanks to the dynamic images it provides, physicians can perform complex procedures with greater safety and precision.

Vascular surgery

In vascular surgery, the C-arm allows detailed visualization of the vascular system, which facilitates procedures such as the stenting to repair aneurysms or the insertion of filters in the vena cava.

Urology

In urology, this equipment is used to guide procedures such as placement of ureteral catheters or nephrostomies. It is also useful in the percutaneous nephrolithotomywhere kidney stones are removed using minimally invasive techniques. Real-time imaging helps physicians locate specific structures and avoid damage to surrounding tissues.

Gastroenterology

In gastroenterologic procedures, the C-arm is used for inserting feeding tubes or drainsas well as for placing esophageal prostheses. This device is especially useful in delicate procedures where precision is crucial, such as in hard-to-reach areas within the gastrointestinal tract.

Neurosurgery

In neurosurgery, the C-arm is used for procedures such as the electrode placement for deep brain stimulation or minimally invasive spinal surgeries. The ability to generate highly accurate intraoperative images is critical for navigating complex structures of the nervous system and ensuring patient safety.

Oncology

In the treatment of cancer, the C-arm is a valuable tool for radiofrequency or microwave ablationswhere localized tumors are destroyed. It is also used for the placement of markers to guide radiation therapy. Its ability to generate precise images allows for accurate positioning of instruments in malignant tissues, optimizing treatment.

Traumatology

In emergency situations or in traumatology, the C-arc is used for evaluate complex fractures and guide reduction procedures. It allows to verify in real time the correct alignment of the bones, which is crucial to ensure the patient's functional recovery.

Emergency procedures

In emergency environments, this equipment is indispensable for the immediate evaluation of serious injuriesas major trauma, and for guiding critical procedures such as thoracic drainage. Its ability to generate immediate images allows physicians to make quick decisions and save lives in critical situations.

Dentistry and maxillofacial surgery

In dentistry and maxillofacial surgery, the C-arm is used for the dental implant placement and surgical planning in the mandibular region. Provides detailed images of the bony structures of the skull and jaw, ensuring accurate results.

Gynecology and obstetrics

In gynecology, this equipment is used for interventional procedures, such as the placement of intrauterine devices or catheters used in fertility treatments. Its use improves the accuracy of procedures in sensitive areas, increasing safety and effectiveness.

 


Conclusion

The C-arm stands out for its versatility, as it is used in multiple medical specialties. Its ability to provide real-time imaging facilitates decision-making during complex procedures, reducing errors and improving clinical outcomes. In addition, by enabling minimally invasive interventions, it contributes to faster patient recovery and greater efficiency in medical resources.

 

Bibliography

Diaz, P. (2023, March 10). Advances in mobile radiology, C-arms and fluoroscopy. El Hospital. Retrieved from https://www.elhospital.com/es/noticias/unidades-moviles-para-radiologia-y-fluoroscopia
Kiko Ramos

CEO of 4D Médica. Expert in marketing and distribution of medical equipment.

Parts and types of ultrasound scanners: Find the perfect model

Parts and types of ultrasound scanners: Find the perfect model

Ultrasoundultrasonography, also known as ultrasonography, is a non-invasive technique using ultrasound to obtain real-time images of the inside of the body. For this purpose, a medical equipment specific: the ultrasound scannerHow does it work and what types of ultrasound scanners are available on the market? We address this in the following article.

The ultrasound scanner: How does it work?

The ultrasound scanner is a medical equipment in the field of image diagnosis. It employs a device called a transducer which emits high-frequency sound waves, called ultrasound. These waves are inaudible to the human ear and travel through the different internal tissues of the body. At the moment when the waves encounter the various organs and structures, it is when are reflected as echoes. These echoes are picked up by the transducer and generate the medical images that can be displayed on a screen. These images are known as ultrasound scans and allow professionals to evaluate different tissues and internal organs of the organism.

In the realization of a ultrasoundis used, a transducer that glides over the skin in the area to be analyzed. This device is coated with a conductive gel that facilitates the transmission of ultrasound waves. It has the function of eliminating the air that exists between the skin and the transducer, helping to improve the quality of the images. In an ultrasound scan, the following can be obtained still images and also allows to observe the movement in real time. It is an essential medical equipment in medicine that has the function of analyzing the state of organs such as the heart or blood flow.

Parts of an ultrasound scanner

An ultrasound scanner consists of the following components:

Parts of an ultrasound scanner Description
Transducer or probe Device in charge of emitting and receiving ultrasonic waves.
Monitor Screen where the images generated by the ultrasound scanner are displayed.
Control panel Interface with buttons and controls to adjust parameters and settings.
Central processing unit Processor that handles the data and generates the ultrasonic images.
Storage system Allows to save images and data obtained during diagnosis.
Power supply Provides electrical power to the device.
Software Program that controls the operation of the ultrasound scanner and processes the images.
Handles and wheels Facilitate the mobility of the equipment within the hospital or clinic.
Ports and connections They allow the connection of accessories and additional devices.

Image of the parts of an ultrasound scanner

Detailed image of the parts of an ultrasound scanner

Transducer or probe

It is the main part of the device, responsible for transforming electrical signals into ultrasound waves. They are made of piezoelectric material and function as ultrasound emitters and receivers. There are different types of transducers:

Depending on its use

  • LinearThey are used for superficial and vascular studies. They generate rectangular images and use high frequencies, since they do not require much penetration, being useful in the exploration of ligaments, tendons, muscles, thyroid, scrotum, breast and superficial vessels.
  • Curved or convexThey have a curved shape and produce trapezoidal images. They are used with low frequencies because they are designed to explore deep structures, as in obstetrics and abdominal studies in general.
  • Endocavitary or intracavitaryThey can be linear or convex. Their frequency varies according to the required penetration. They are used in intravaginal and intrarectal studies, for gynecological or prostate examinations.
  • SectorialThey are a variant of the convex transducers and offer triangular or fan-shaped images. They use frequencies similar to those of curved transducers and allow an intercostal approach, so they are used in cardiac and abdominal studies.

According to frequency

  • High frequency (up to 15 MHz)They are used to explore small and superficial structures.
  • Low frequency (approximately 2.5 MHz)They are used for ultrasound scans that require a greater depth of penetration.

Monitor

Displays the images generated by the processing unit.The image is displayed on the monitor, so that professionals can observe and evaluate the state of the different anatomical structures in real time. Most current monitors can reproduce images in grayscale and color.

Control panel

It is located in the front part of the ultrasound scanner and allows the ultrasound specialist to make various adjustments to the equipment configuration. It allows to modify the brightness, the sharpness of the images and the frequency of the sound waves. In addition, it also allows to configure the necessary parameters to carry out the type of ultrasound that the patient requires.

Central processing unit

It is the component that receives the information provided by the probe. It converts the signals into electrical impulses and generates the image of the anatomical part of the area to be analyzed.

Storage system

It is the internal element that allows to save images and patient's data for further analysis. It can consist of an internal memory, USB or be connected to a PACS system (Picture Archiving and Communication System).

Power supply

Provides power to the ultrasound machineThe power supply is provided either by alternating current or by rechargeable batteries in the portable models.

Software

It is essential for processing ultrasound signals and generating medical images. It can include specific modules for different types of studies, such as cardiology or gynecology, among other areas.

Handles and wheels

These elements facilitate handling and transport of the equipmentespecially in the case of mobile ultrasound scanners.

Ports and connections

This type of components included in the ultrasound scanners are used for connect multiple probes, USB devices or DICOM interfaces to share images.

Types of ultrasound scanners

Having analyzed the operation of an ultrasound scanner and its main components, we can differentiate between different types of ultrasound scanners:

Category Types of ultrasound scanners
Imaging technology
  1. 2D ultrasound scanners
  2. 3D ultrasound scanners
  3. 4D ultrasound scanners
  4. Doppler ultrasound scanners
    • Color Doppler
    • Pulsed Doppler
    • Continuous Doppler
  5. Tissue Doppler Ultrasound Scanners
Mobility
  1. Portable ultrasound scanners
  2. Cart or console ultrasound scanners
  3. Wireless ultrasound scanners
Clinical Specialty
  1. Obstetrics and gynecology:
  2. Cardiac (Echocardiograms)
  3. Vascular
  4. Musculoskeletal and physical therapy
  5. Abdominals
  6. Neurological
  7. Urological
  8. Endoscopic
Resolution and advanced technology
  1. High resolution ultrasound scanners
  2. Ultrasound scanners with Artificial Intelligence (AI)
Type of purchase
  1. New ultrasound scanners
  2. Used ultrasound scanners

Imaging technology

1. 2D ultrasound scanners

  • These are the most common and basic models. Generan two-dimensional images in real timeThey are widely used in the obstetrics area, to perform general and abdominal studies.
  • Main applicationsBasic analysis, pregnancy control and organ evaluation.

2. 3D ultrasound scanners

  • Allow display three-dimensional structures in real timeproviding greater detail. They are useful for creating more accurate images of fetuses and studying structural abnormalities.
  • Main applicationsThey are used in advanced obstetrics and for surface studies of organs and tumors.

3. 4D ultrasound scanners

  • They add the time dimension to 3D imagesallowing to see the movement in real time. It is especially useful in the obstetrics area to see fetal movements.
  • Main applicationsObstetrical diagnosis and dynamic studies of joints.

4. Doppler ultrasound scanners

  • They use the Doppler effect for assessing blood flow in vessels and organs. There are different models and variants:
    • Color DopplerThey offer a color representation of the blood flow.
    • Pulsed Doppler technologyThey provide a more detailed analysis of blood flow velocities.
    • Continuous DopplerThey measure very fast flows.
  • Main applicationsThey are used for vascular, cardiac and circulatory studies.

5. Tissue Doppler Ultrasound Scanners

  • They are in charge of making a specific evaluation of the movements of the heart tissues and blood flow.

Mobility

1. Portable ultrasound scanners

  • They are small and lightweight devicesThey are ideal for home transport, emergency or remote areas. There are multiple versions that include advanced technologies, such as 2D ultrasound, Doppler, etc.
  • Main applicationsThey are used for emergencies and ICU, mobile clinics and medical visits to remote areas.

2. Trolley or console ultrasound scanners

  • They are larger and more robust models. They have a fixed console that offers a variety of functions and high-resolution imaging options.
  • Main applicationsThey are used in hospitals and specialized clinics.

3. Wireless ultrasound scanners

  • They are connected to mobile devicesThe medical imaging systems, such as tablets or smartphones, through applications. They are characterized by high portability and immediate access to the generated medical images.
  • Main applicationsThey are used in sports medicine, emergencies and telemedicine.
Image of types of ultrasound scanners

Types of ultrasound scanners

Clinical Specialty

1. Obstetrics and gynecology

  • This type of transvaginal ultrasound scanners are specialized in the visualization of the fetus, uterus and ovaries of women.

2. Cardiac (Echocardiograms)

  • They are designed to evaluate the structure and heart function, valves and blood flow.

Vascular

  • They are used for analize arteries and veinsmeasuring the flow and detecting obstructions or thrombi.

4. Musculoskeletal and Physical Therapy

  • Allow visualizing muscles, ligaments, tendons and joints. These physiotherapy ultrasound scanners are used in sports medicine to detect injuries or to analyze the recovery from an injury.

5. Abdominals

  • They are oriented to the study of abdominal organs like the liver, kidneys, spleen or pancreas.

6. Neurological

  • They are used for assessing the brainespecially in neonates.

7. Urological

  • These devices are designed to examine the kidneys, bladder and prostate of the male.

8. Endoscopic

  • They combine ultrasound with endoscopes to obtain internal images of the digestive tract or areas of difficult access.

Resolution and advanced technology

1. High resolution

  • This type of medical equipment offers images of the highest qualityIt is therefore especially useful in complex applications.

2. Ultrasound scanners with Artificial Intelligence (AI)

Type of purchase

1. New ultrasound scanners

New ultrasound scanners are newly manufactured, previously unused ultrasound machines with the latest technology upgrades and full manufacturer's warranties. They feature the following characteristics:

  • State-of-the-art technologyThey incorporate the latest innovations in imaging, such as advanced Doppler, elastography, 3D and 4D ultrasound and even artificial intelligence.
  • Full warrantyThey offer extensive warranties that are backed by the manufacturer, generally from 1 to 5 years.
  • CustomizationYou have the possibility to configure the equipment according to your specific needs, including transducers and software.
  • Longer service lifeSince they have no previous use, their potential useful life is longer, especially if proper maintenance is carried out.
  • Certifications and technical supportThey comply with all current quality and medical safety standards. In addition, they have specialized technical support.

2. Second-hand or opportunity ultrasound scanners

Pre-owned ultrasound scanners are previously used ultrasound machines that have been refurbished or overhauled to ensure their functionality before being sold again. These devices may come from clinics, hospitals or practices that have refurbished them for newer models or no longer need them. Compared to new models, they have the following features characteristics:

  • Technical reviewBefore being sold, ultrasound scanners undergo a series of quality tests to ensure that they are functioning properly. These may include repairs, cleaning, calibration and software upgrades.
  • Reduced priceThey are less expensive than new equipment, which makes them attractive for small clinics, independent physicians or institutions with limited budgets.
  • Variety of modelsYou can find from basic ultrasound scanners to advanced equipment with technologies such as Doppler or 3D.
  • Limited WarrantySome suppliers offer warranties, but these are usually shorter than those for new equipment.
  • Variable statusThe performance and service life of used ultrasound scanners will depend on how well the device has been maintained during previous use.

In conclusion

The ultrasound scanner is a medical equipment that is widely used in the field of diagnostic imaging to perform one of the most popular medical tests: ultrasound. Depending on the technology, mobility, medical specialty and type of purchase, different types of ultrasound scanners can be found.

With more than 20 years of experience in this field, DiagXimag offers a wide range of ultrasound scanners of different specialties and brands to suit every medical need.

Bibliography

Luis Daniel Fernandez Perez

Director of Diagximag. Distributor of medical imaging equipment and solutions.

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