MRI

Magnetic Resonance Imaging (MRI) is a technique that generates images of the body’s internal structures. It works by sending radio waves through a strong magnetic field. Different body structures emit different frequencies of radio waves, which are then mapped and converted into digital images by a computer. MRI is particularly effective for imaging soft tissues in the body, including the brain, nerves, muscles, and organs.

MRI provides detailed images that allow doctors to evaluate various body parts and certain diseases more effectively than other imaging methods such as x-ray, ultrasound, or computed tomography (CT or CAT scanning).

You will lie on your back on a movable table that slides into the center of the MRI machine. The technologist may use straps or bolsters to help you stay still and maintain the correct position during the examination. A device called a coil may be placed around the body part being studied. This device sends and receives the radio waves used to generate the image.

The MRI scanner makes a lot of noise. You will be given earplugs or headphones to wear during the examination to reduce the noise. It’s crucial to follow the technologist’s instructions. You will be asked to stay still multiple times throughout the examination while each sequence is being performed. Each sequence lasts between 2-10 minutes. If you are claustrophobic (afraid of enclosed spaces), you may want to discuss the possibility of receiving sedation for the study with your doctor before your appointment.

Some studies require the injection of contrast material into the vein. The contrast used for MRI is called gadolinium, which is different from the contrast used for CT scans. A radiology technologist or nurse will insert an intravenous line to administer the contrast. Most MRI examinations last between 30 to 60 minutes.