Overview Of Magnetic Resonance Imaging (MRI) Scans

Expectations During The Scan

During a magnetic resonance imaging scan, patients can expect to hear some noises coming from the machine and its magnets. However, they may also ask their doctor for some earplugs or headphones to help distract them from this noise. Patients often have to remain still for the duration of a magnetic resonance imaging scan, which can span from fifteen minutes to one hour.

However, it is worth noting that there is an exception to staying still during this type of scan. Patients who are undergoing a functional magnetic resonance imaging scan are able to move. Of course, it is for a specific purpose. The technician will ask them to perform specific actions, such as tapping their fingers together or answering simple questions. The purpose of this is to determine what parts of their brain control these actions.

Compare magnetic resonance imaging to other imaging tests next.

Compared To Other Imaging Tests

Magnetic resonance imaging does not use the same mechanisms x-rays and computerized tomography scans use to produce images of the body's structures and organs. This difference means magnetic resonance imaging scans do not use any of the potentially harmful ionizing radiation used by a computerized tomography scan. However, magnetic resonance imaging does use magnets within the machine that can produce problems if certain patients do not prepare for the scan properly.

Another difference between magnetic resonance imaging and other diagnostic imaging techniques is that the MRI machine has a much smaller opening into which the patient can slide. Some patients who undergo magnetic resonance imaging may need to be lightly sedated due to feeling claustrophobic inside the machine. Magnetic resonance imaging scans usually take longer than the typical x-ray or computerized tomography scan. A doctor decides which medical imaging technique to use based on the medical reason for the scan, the amount of detail needed, and any factors that may make certain scans intolerable.

Discover the risks linked to magnetic resonance imaging next.