What is MRI?

Magnetic Resonance Imaging (MRI) does not use x-rays or radiation. Instead, a combination of common radio waves and a magnetic field are used to obtain the images.

During the examination, a large magnet in the MRI unit aligns the nuclei of hydrogen atoms in your body in one direction. Radio waves transmitted into the MRI unit change the alignment of the hydrogen atoms at a rapid rate. These changes are measured and fed into the MRI computer system where thousands of mathematical calculations are made. The results are displayed as images on a computer screen. MRI, in effect, draws a map of the hydrogen atoms in your body. These images can help your physician diagnose your condition and plan your treatment.

Procedure

If it is necessary, you will be asked to change into a patient gown. Because you will be placed in a magnetic field during the examination, you must remove all jewelry, metal objects and credit cards before you can be examined.

The technologist will bring you into the MRI suite and help you lie down on a comfortable, padded table. You will be positioned on the table and reminded to remain as motionless as possible during the examination. The table will move electronically, placing you in the correct position inside the tube-like MRI scanner. The inside of the MRI unit is well lighted and ventilated. During the study you will hear a rapid drumming noise and may feel some vibration. A friend or relative may be in the room during the examination if necessary.

Post Exam

The radiologist will review your examination before you leave to make sure adequate images have been obtained. He will then interpret the images and send a written report to your doctor. You doctor will discuss the results with you.