You will lie very still on a sliding table. Depending on your condition, you may have monitors to track your pulse, heart rate, and breathing. The table will slide into a narrow, enclosed cylinder. In some machines, the sides are open, so you can look out into the room.
If a contrast dye is used, a small IV needle is inserted into your hand or arm before you slide into the machine. First, a saline solution is dripped into your vein to prevent clotting. Then, the dye is injected. You might have an allergic reaction to the dye, but this is rare.
The technician will leave the room. Through the intercom, the technician will give you directions, such as to hold your breath. You can talk to the technician through this intercom as well. The technician will take the pictures. When the exam is done, you will slide out of the machine. If you have an IV needle, it will be removed.
If you are claustrophobic or unable to lie on a flat table, there are open MRI machines available. They allow you to have the test done without being put in a narrow cylinder. There are also MRI machines that allow a patient to be in a sitting position. This may be important for patients with concerns, like a painful back.
You will be asked to wait at the facility while the images are examined. The technician may need more images.
If you took a sedative, do not drive, operate machinery, or make important decisions until it wears off completely.
If you are breastfeeding and receive a contrast dye, you and your doctor should discuss when you should restart breastfeeding. Information available has not found any ill effects to the baby of a breastfeeding mother who has had contrast dye.
The exam is painless. If you have dye injected, there may be stinging when the IV needle is inserted. You may also feel a slight cooling sensation as the dye is injected.
If you have a fear of enclosed spaces, the exam may be very hard for you. Your doctor may have you take a sedative. You can also ask your doctor about an open MRI, which is larger and has openings on all sides.