Each sequence provides a specific image orientation and a specified degree of image clarity or contrast. Depending on the type of exam being done, the total time needed can range from 10 to 60 minutes, not counting the time needed to change clothing, have an IV put in, and answer questions. When contrast medium is needed, a substance called gadolinium is given by IV injection during one of the imaging sequences. It highlights blood vessels, making them stand out from surrounding tissues. The radiologist and technologist leave the examining room during the actual imaging process, but the patient can communicate with them at any time using an intercom.
Some centers permit a friend to stay nearby, or a parent if a child is being examined.
When the exam is completed you will be asked to wait to make sure that more images are not needed. The technologist will make you as comfortable as possible, but at times the magnet may be within a few inches of your face. For those who become very uncomfortable when enclosed in a small space, a mild sedative is nearly always effective. You may notice a warm feeling in the area being studied. This is normal, but do not hesitate to report it if it bothers you.