Search for any health
topic on HealthMash:
 | ||
What is MRI?
An MRI exam causes no pain. Some people may become anxious inside the scanner. If you have difficulty lying still or are very anxious, you may be given a mild sedative. Excessive movement can blur MRI images and cause errors.
Read more on www.nlm.nih.gov
Also known as magnetic resonance imaging, nuclear magnetic resonance imaging
Explore and Discover
Health Concerns
» epilepsy
Alternative Medicine
MRI information from trusted sources:
Neurology -- Collected Resources : MRI
MRI. Citations 1-10 of 1110 total displayed. ... Magnetic Source Imaging (MSI) · Near Infrared Spectroscopy (NIRS) · DWI · MTI · Volumetric MRI ... Read more on
www.neurology.org
Ruby MRI - Wikipedia, the free encyclopedia
Matz's Ruby Interpreter or Ruby MRI (also called CRuby) is the reference implementation of the Ruby programming language. ... Read more on
en.wikipedia.org
Definition of MRI - NCI Dictionary of Cancer Terms
MRI makes better images of organs and soft tissue than other scanning techniques , such as computed tomography (CT) or x-ray. MRI is especially useful for ... Read more on
www.cancer.gov
Magnetic Resonance Imaging (MRI) without Sedation
MRI is a routine diagnostic imaging exam that uses a large magnet, radio waves and a computer to produce 2- and 3-dimensional images of your child's body's ... Read more on
www.childrenshospital.org
MRI
Magnetic resonance imaging (MRI) is a noninvasive way to take pictures of the body. Unlike x-rays and computed tomographic (CT) scans, which use radiation, MRI uses powerful magnets and radio waves. The MRI scanner contains the magnet. The magnetic field produced by an MRI is about 10 thousand times greater than the earth's. The magnetic field forces hydrogen atoms in the body to line up in a certain way (similar to how the needle on a compass moves when you hold it near a magnet). When radio waves are sent toward the lined-up hydrogen atoms, they bounce back, and a computer records the signal. Different types of tissues send back different signals. Single MRI images are called slices. The images can be stored on a computer or printed on film. One exam produces dozens or sometimes hundreds of images. For more information, see the specific MRI topics: Abdominal MRI Chest MRI Cranial MRI Heart MRI Lumbosacral spine MRI Spine MRI Read more on
www.nlm.nih.gov
What Is Magnetic Resonance Imaging (MRI)?
Magnetic Resonance Imaging, or MRI, is a painless and safe diagnostic procedure that uses a powerful magnet and radio waves to produce detailed images of ... Read more on
www.ehealthmd.com
Magnetic Resonance Imaging (MRI) - Body
Current and accurate information for patients about Magnetic Resonance Imaging ( MRI) - Body. Learn what you might experience, how to prepare for the exam, ... Read more on
www.radiologyinfo.org
Contents
How the Test is Performed
You may be asked to wear a hospital gown or clothing without metal fasteners (such as sweatpants and a t-shirt). Certain types of metal can cause inaccurate images.
Read more on
www.nlm.nih.gov
How to Prepare for the Test
Depending on the area being studied, you may be asked not to eat or drink anything for 4 - 6 hours before the scan. Other preparations are usually not needed.
Read more on
www.nlm.nih.gov
How you prepare
Before an MRI exam, eat normally and continue to take your usual medications, unless otherwise instructed. You will be asked to change into a gown and to remove: Jewelry; Hairpins; Eyeglasses; Watches; Wigs; Dentures; Hearing aids; Underwire bras
Read more on
www.mayoclinic.com
Indications
Combining MRIs with other imaging methods can often help the doctor make a more definitive diagnosis.
Read more on
www.nlm.nih.gov
Normal Results
Results are considered normal if the organs and structures being examined are normal in appearance.
Read more on
www.nlm.nih.gov
Risks
MRI contains no ionizing radiation. To date, there have been no documented significant side effects of the magnetic fields and radio waves used on the human body.
Read more on
www.nlm.nih.gov
What Abnormal Results Mean
Results depend on the part of the body being examined and the nature of the problem. Different types of tissues send back different MRI signals. For example, healthy tissue sends back a slightly different signal than cancerous tissue. Consult your health care provider with any questions and concerns.
Read more on
www.nlm.nih.gov
What you can expect
During the test The MRI machine looks like a tunnel that has both ends open. You lie down on a movable table that slides into the opening of the tunnel. A technologist monitors you from another room. You can talk with him or her by microphone.
Read more on
www.mayoclinic.com
Why it's done
MRI is a noninvasive way for your doctor to examine your organs, tissues and skeletal system. It produces high-resolution images that help diagnose a variety of problems.
Read more on
www.mayoclinic.com