Brain MRI can be an invaluable tool for the diagnosis and monitoring of a variety of conditions. However, some patients find it extremely difficult to successfully complete the procedure. That’s because MRI can involve extended periods in a confined space, and it requires patients to remain still while images are being taken. Children (especially those who are very young), patients who are claustrophobic or anxious in small spaces, those who are in pain, or who experience involuntary movements like tremors or tics may be unable to remain still long enough to complete the exam. In these cases, sedatives or even general anesthesia may be prescribed so a patient can undergo the procedure.
MRI of the brain produces clearer, more detailed images than other technologies. While CT scans are also important for brain imaging, they are less able to visualize details within organs and tissues than MRI. As a result, MRI is an important part of diagnosing conditions like tumors, inflammation, and internal bleeding, and it can allow doctors to detect signs of stroke within as little as 30 minutes from onset. Brain MRI is also frequently used to diagnose issues such as
If your doctor has ordered a brain MRI, it’s because the procedure can reveal medical information that is important for your care. If an MRI will be difficult for you to complete, talk about this with your doctor. There are several steps that can be taken to increase your comfort and ability to complete the exam.
MRI exams are performed on an outpatient basis. After you arrive at the imaging center, a technologist will take a brief medical history. Because of the strong magnetic field produced by the MRI machine, you’ll need to remove all jewelry (and anything else that contains metal) and change into a gown. If contrast dye is being used, it will be injected into a vein in your arm while you’re lying on the exam table. Straps and bolsters may be used to help you comfortably maintain needed positions. The table will slide into the scanning area, and the technologist will leave the room. However, they will still be able to see and hear you.
While taking images, the MRI machine makes a rapid tapping noise. It’s important to remain a still as possible during this process. A brain MRI without contrast typically takes 30–60 minutes. If contrast is being used, plan for the exam to take approximately 15 minutes longer. In some cases, the radiologist may also perform MR spectroscopy, which can extend the exam by an additional 15 minutes. MR spectroscopy provides information about the chemical composition of tissues that can help shed light on disease processes.
Patients who are unable to remain still often need sedation or anesthesia to complete an MRI exam. In some cases, sedation is also useful for patients who suffer from anxiety or claustrophobia. However, other steps can also be taken to make the exam more comfortable. If you’re feeling anxious about your MRI, talk to your doctor and your chosen imaging center about your options. Below are some measures that could help.
If you and your doctor decide together that sedation is needed, you’ll likely be given a prescription for an oral benzodiazepine, such as Xanax, Ativan, or Valium, to fill before your imaging appointment. Alternatively, your doctor may order IV sedation or general anesthesia, which may require you to undergo the exam at a hospital. If you take any of these medications, you will need to arrange a safe ride home from your appointment.
At Iowa Radiology, we strive to ensure our patients receive the very best care and are as comfortable as possible during their time with us. We provide blankets and music headsets and offer wide-bore MRI exams. Updated protocols allow us to complete most MRI exams in just 20–25 minutes. Results are typically delivered to the referring doctor within one to two days, including a signed report with interpretation of results. To learn more about MRI exams, see our free ebooks.
Cedars-Sinai. MR Spectroscopy. Cedars-Sinai.org. Published May 18, 2010. Accessed June 14, 2023. https://www.cedars-sinai.org/programs/imaging-center/med-pros/neuroradiology/mr-spectroscopy.html
Radiological Society of North America. Head MRI. Radiologyinfo.org. Reviewed May 1, 2023. Accessed June 14, 2023. https://www.radiologyinfo.org/en/info/headmr.
Ugan R, White MJ, Wilson SR. Anaesthesia for magnetic resonance imaging. Cont Educ Anaesth Crit Care Pain. 2012;12(3):140–144. https://doi.org/10.1093/bjaceaccp/mks002.