PET-MRI is an advanced hybrid imaging technology that combines Positron Emission Tomography (PET) and Magnetic Resonance Imaging (MRI). This combination allows for obtaining metabolic and functional images of the body (through PET) along with high-resolution anatomical images (through MRI), providing a more accurate and complete diagnosis in a single scan.
What is this test for?
PET-MRI is mainly used for:
Oncology: It is used for the diagnosis, staging, and follow-up of malignant tumors. It is especially useful for identifying small or hard-to-detect lesions.
Neurology: It is used to evaluate neurodegenerative diseases such as Alzheimer’s, epilepsies, and other brain pathologies.
Cardiology: It is used to analyze blood flow and cardiac function.
Medical research: Widely used in clinical studies and in the evaluation of new therapies.
Benefits of the high technology of PET-MRI
PET uses radiopharmaceuticals that emit positrons to detect metabolic activity in the body, while MRI uses magnetic fields and radio waves to generate detailed images of internal structures. By combining both techniques, PET-MRI provides anatomical, functional, and metabolic information in a single study, which improves diagnostic accuracy.
What is the procedure like?
The PET-MRI procedure involves:
Preparation:
Generally, you will need to fast for 4 to 6 hours before the exam, but check with your doctor to confirm. It is recommended to drink water before the study. Be sure to inform your doctor if you are taking any medication, if you are pregnant, or if you are breastfeeding. Also, wear comfortable clothing without any metal elements.
During the test:
During the procedure, a radiopharmaceutical will be administered intravenously. This material is safe and is quickly eliminated from the body due to its short half-life. Afterwards, you will be asked to lie on the gurney of the PET-MRI scanner. First, metabolic images will be taken with the PET technique, and then anatomical images with the MRI. It is important that you remain still to ensure the quality of the images. The study usually lasts between 60 and 90 minutes.
After the test:
After the procedure, you can resume your usual activities, unless your doctor indicates otherwise. It is recommended that you drink plenty of water to facilitate the elimination of the radiopharmaceutical from your body. A specialized radiologist will analyze the PET-MRI results and send them to your doctor, who will explain the findings and, if necessary, suggest the most appropriate treatment.
Recommendations for the test
During the procedure, it is important that you remain as still as possible to ensure the accuracy of the images. Also, follow all of your doctor’s instructions before, during, and after the study to ensure an optimal result.
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 medical team if this happens to you; measures can be taken to help you feel more comfortable.
Allergic reactions (rare): In exceptional cases, there may be allergic reactions to the radiopharmaceutical.
To ensure your test goes smoothly, we ask that you arrive before the scheduled time. This will allow us to complete the necessary administrative and clinical preparation.
Before the test, we will give you the Informed Consent, 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, metal objects, prostheses (including dental ones), tattoos, or medication infusion devices, such as insulin pumps.
These diagnostic tests are very safe, but as with any medical procedure, there is a minimal possibility of an incident.
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