PET-MRI
What is PET-MRI?
PET-MRI is a hybrid imaging technique that combines Positron Emission Tomography (PET) and Magnetic Resonance Imaging (MRI). This advanced technology allows for obtaining metabolic and functional images of the body (PET) along with high-resolution anatomical images (MRI), all in a single study. It is especially useful for the diagnosis, planning, and monitoring of various diseases.
What is this procedure used for?
PET-MRI is used for:
- Oncological diagnosis: Detecting tumors, evaluating their extent, and determining if they are malignant.
- Neurology: Identifying neurodegenerative diseases such as Alzheimer’s or evaluating epilepsy and other brain pathologies.
- Cardiology: evaluating blood flow and cardiac function.
- Therapeutic planning: Helps doctors plan more precise treatments based on metabolic and anatomical information.
- Monitoring treatment response: Allows evaluation of how the body responds to therapies such as chemotherapy or radiotherapy.
Benefits of high technology in PET-MRI
PET uses radiopharmaceuticals that emit positrons to detect metabolic activity in the body. MRI, on the other hand, uses magnetic fields and radio waves to generate detailed images of internal structures. By combining both techniques, PET-MRI provides more complete and precise information than either modality alone.
How is the procedure performed?
The PET-MRI procedure involves:
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Preparation:
Before the exam, you will generally need to fast for 4 to 6 hours, but consult your doctor to confirm. It is advisable to drink water before the study. Also, be sure to inform your doctor about any medications you are taking. If you are pregnant or breastfeeding, notify your doctor. Additionally, wear comfortable clothing without metallic elements for the procedure.
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During the test:
You will be administered a radiopharmaceutical intravenously. This material is safe and is quickly eliminated from the body due to its short half-life. Then, you will be asked to lie on the PET-MRI scanner table. First, metabolic images will be taken using PET, followed by anatomical images using MRI. It is important to remain still during the procedure to ensure image quality. The exam will last approximately 60 to 90 minutes.
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After the test:
You can resume your normal activities immediately after the exam. It is essential to drink plenty of water to help eliminate the radiopharmaceutical from your body. The PET-MRI results will be analyzed by a specialized radiologist and sent to your doctor, who will explain the findings and recommend appropriate treatment, if necessary.
Recommendations for the test
Remember that it is important to follow these recommendations:
- Avoid movement: During the procedure, it is important to remain as still as possible to ensure the accuracy of the biopsy.
- Follow medical instructions: Follow your doctor’s instructions before, during, and after the procedure.
Are there any risks?
PET-MRI is a safe procedure, but there are some minimal risks:
- Radiation exposure: PET uses a small amount of radiation due to the administered radiopharmaceutical. However, the dose is low and considered safe.
- Claustrophobia: Some people may experience anxiety while inside the MRI scanner. Inform the staff if this happens; measures can be taken to help you feel more comfortable.
- Allergic reactions (rare): In exceptional cases, there may be allergic reactions to the radiopharmaceutical.
For your test to proceed smoothly, we ask that you arrive in advance of your scheduled time. This will allow us to complete the necessary administrative and clinical preparation.
Before the test, we will provide you with the Informed Consent form, a document with important information that you must read and sign.
If your appointment is for a Magnetic Resonance Imaging (MRI), it is crucial that you inform us about the presence of pacemakers, metallic objects, prostheses (including dental), tattoos, or medication infusion devices, such as insulin pumps.
