What is an MRI?
Magnetic resonance imaging (MRI) is a painless way to look inside your body without using X-rays. Instead, it uses a large magnet, radiowaves, and a computer to scan your body and create detailed pictures that cannot be seen with conventional X-rays.

How does an MRI scanner work?
Your body is composed primarily of small hydrogen atoms that, typically, spin around randomly. Inside a strong magnetic field, however, the atoms spin in the same direction. When a radiowave is then passed through your body, the hydrogen atom gives off a signal which is the source of the MRI information. A computer converts this signal into images that will assist your doctor in diagnosing and planning your treatment.

Why is MRI important?
MRI offers a non-invasive way to obtain information about your body that may otherwise not be easily seen. It can lead to early detection and treatment of medical conditions and has no known side effects. MRI can provide important information about the spine, joints, and internal organs.

What can I expect?
When your doctor refers you for an MRI exam, arrange a time to talk about all your questions and concerns. It is important to tell your doctor if you have a pacemaker, think you are pregnant, have a medication or dietary concern that could interfere with the exam. Inform your doctor if you are claustrophobic (afraid of closed-in places). Please tell your doctor if you are, or ever have been, a machinist, welder, auto mechanic, or work with metal in any capacity. It is important to let your doctor know if you even suspect you have anything metallic within your body such as surgical clips, rods, pins or screws, metal plates, pellets or bullets, shrapnel, BB shots, cochlear implants, neurostimulators or permanent tattoos. These materials may interfere with your exam.

What must I do to prepare for the exam?
Limit the amount of liquids you drink on the day of the exam. Otherwise, you may go about your normal routine. When you arrive, a technologist will ask you to remove anything metallic such as a hearing aid, partial plate, jewelry, or hairpins. You will change into a gown and place your clothes and personal belongings in a locker for safekeeping.

What happens during the MRI exam?
The MRI magnet is in a large cylinder. Before the scan, a technologist will assist you on to the scanning table. Usually, you will lie on your back during the exam but you may be asked to lie on your stomach. The table will slide smoothly into the cylinder and stop when the area to be scanned is in the center of the magnet. It is very important that you do not move during the exam. You will not feel a thing during the exam but you may hear a loud tapping noise; this is normal. You may either listen to music through headphones or wear earplugs during the exam. An overhead speaker and microphone will allow you to communicate with the technologist during the exam. A call button is also provided.

When is a contrast agent needed?
In some cases, the doctor may order a contrast agent. Contrast material is injected into a vein in your arm. It helps to make some of the structures within your body more clear.

How long does it take?
The typical exam takes 30-45 minutes, which passes quickly. Some people even go to sleep. When the exam is complete, the technologist will help you off the table and show you where to collect your personal belongings. MRI images will be given to you to take to your doctor's office.

After the exam.
After the exam, a radiologist will review the images. In rare instances, the radiologist may request that you return for additional views to help clarify certain structures within your body. A report will be generated and a copy of the results will be sent to your doctor.