What is MRI and how does it work?

Magnetic Resonance imaging (MRI) is an advanced diagnostic tool used by radiologists to detect subtle abnormalities that are not visible using other types of imaging. The MRI scanner uses a very powerful magnetic field to image the human body. The magnetic fields used in MRI have attractive forces many times that of small hand held magnets. A specially designed computer creates extremely clear and precise images to help find subtle abnormalities within the body. For some MRI scans, a contrast (dye) injection may be necessary to highlight certain tissues for closer examination. MRI exams do not involve X-rays or radioactive material.

What happens during your MRI?

• Because the MRI uses a powerful magnet, we will ask you to complete a safety questionnaire to learn if you have implants or other sources of metal in your body.
• Patients with a cardiac pacemaker or an implanted cardiac defibrillator cannot undergo an MRI.
• If you have an aneurysm clip, cardiac stent or neurostimulator, please let us know when you are scheduling your appointment. Further instructions will be given during the scheduling process.
• If you have been exposed to flying metal fragments, either in your work (welding, grinding, etc) or accidentally, please inform us during scheduling. Arrangements may need to be made to obtain an X-ray of the eye before the MRI scan.
• We will ask you to remove any metal including jewelry, eye glasses, hearing aids, dental work, hair clips and hair pieces before your scan.
• Our MR technologists or the radiologist will ask you some medical questions and review what you can expect during the MRI.
• We will make you as comfortable as possible on the exam table before the scan begins. Because the scanner can be noisy, we will provide you with ear protection.
• The table will slide into the MRI unit where the scan will be conducted. Please lie as still as possible to avoid blurring the images.
• You will be able to communicate with the MR technologist at all times during your exam.
• Most MRI exams last less than one hour.

What happens when the MRI is complete?

• You may leave immediately after your MRI is completed.