Overview Of Magnetic Resonance Imaging (MRI) Scans

Scans With Contrast

In most cases, magnetic resonance imaging does not use any contrast dye. Doctors will only order scans with contrast when they deem them absolutely necessary. The dye used in magnetic resonance imaging is gadolinium-based. Doctors will inject it intravenously. The purpose of contrast in one of these scans is to boost the quality of the image. This provides more accurate diagnoses. Contrast dye does not cause permanent organ discoloration. The patient’s body will absorb the dye or they will get rid of it through their urine. Pregnant women and those with compromised kidneys are not able to get one of these scans with contrast. The contrast medium, unfortunately, has some potential side effects as well. They include dizziness, hives, blood clots, and an allergic reaction. Thus, other patients may not be able to have the dye in magnetic resonance imaging. They include those with allergies, hypotension, and sickle cell disease.

Learn about how to prepare for the scan next.

Preparing For An MRI Scan

Patients can eat food, drink beverages, and take their medications normally before their magnetic resonance imaging scan unless their doctor informs them otherwise. When a patient arrives at the facility that will carry out the scan, they are usually asked to change into a gown. They will also be asked to remove any jewelry they have on, hairpins or hairclips, eyeglasses, watches, and wigs that contain metal. Patients have to remove any dentures, take off any hearing aids, and wash off cosmetics that may contain metal fragments as well.

An individual who has discussed concerns regarding feeling claustrophobic or very anxious during the scan may receive oral or intravenous medication to help make them comfortable during the procedure. Patients sensitive to loud or repetitive noises are provided with earplugs so that they do not hear the tapping, thumping, and other noises made by the machine. Some patients will have gadolinium injected into a vein to act as a contrast agent.

Continue reading to learn about what to expect during a scan next.