A magnetic resonance imaging (MRI) scan is a type of imaging technique that uses a magnetic field and radio waves to create detailed, cross-sectional images of the body.
MRI uses magnetic fields and radio waves to create cross-sectional images. The images are best used to visualize soft tissue, such as muscles, tendons, and blood vessels. You will need to remove any metallic objects, including jewelry, and change into a hospital gown before entering the machine.
Advantages
- Most sensitive imaging technique of the head.
- Used to diagnose and visualize a tumor or determine if cancer has spread.
- Details from MRI images can help determine the stage of a tumor.
- Best for soft tissue, such as muscles, tendons, blood vessels.
- Images of soft tissue are more detailed than those of a CT scan.
- Safe and generally risk-free, with no radiation involved.
Disadvantages
- Lasts longer and costs more than a CT scan.
- You must remain still during the scan.
- Individuals with implanted metal may not be able to undergo an MRI scan.
- You may experience some claustrophobia during the scan, as the MRI machine is a small space.
What to Expect
Prior to the MRI, you may be administered a special dye, known as contrast, that highlights tumors or inflammation. The contrast will be given through an intravenous (IV) line. You will then lie down on a table, and your head will lay in a special headrest that minimizes movement.
You must stay still during the exam to produce the highest resolution images. The table will be rolled into the MRI machine, which resembles a large donut or tunnel. The machine makes loud noises as it creates the images, and you can request earplugs to dampen the sound, if needed.
Some patients may experience feelings of claustrophobia, because the space is somewhat small. These feelings are normal, and the technicians can offer strategies to help you remain calm and cope with this sensation.
The scan will likely last around 30 to 60 minutes. All MRI scanners are equipped with a microphone so that you may communicate with the technician during the test if you need assistance or reassurance. The results will take time to process after the MRI is complete. Typically, the doctor will call to discuss the MRI results with you once they are ready. You should coordinate with their care provider about following up after an MRI scan.
Your doctor may request intermittent follow-up scans to monitor your treatment. Usually, MRI scans are common as a diagnostic tool at the beginning of your treatment journey, but follow-up scans may be necessary.
Download This Section
Feel free to download and print this page.
It’s free for personal use and to share with others you think might benefit from the information provided.
