mri

Information, Symptoms, Treatments and Resources

What is mri?

Magnetic resonance imaging (MRI) is a non-invasive 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. For example, healthy tissue sends back a slightly different signal than cancerous tissue.

Single MRI images are called slices. The images can be stored on a computer or printed on film.

MRI can easily be performed through clothing. However, because the magnet is very, very strong, certain types of metal can cause significant errors, called artifacts, in the images.

Alternative Names:

Magnetic resonance imaging; Nuclear magnetic resonance (NMR) imaging

Posts on mri (769)

I am being told by doctors so far that with me having DHEA levels at 1499 I may have a tum...
Hi! I recently had a MRI which came back with a finding of a nonspecific 6mm focus of abno...
Please translate this info from the impressions of a MRI 1. two adjacent soft tissue les...
Hi - I have had back pain/right leg pain and right hip pain for almost a year and just had ...
Does my neck looked damaged in these mri photo's? What do think. Any input is welcome.
what do think of the condition of my neck? I'm just a wondering. mri pictures at my page l...
Would you like to give me an off the wall opinion of my neck. I would not mind at all. A...
I recently had an mri scan and an blue ink injection during the scan, prior to finding out ...
I went to the ER last night because of a headache that made it difficult for me to sleep. I...
I have had a MRI last week showed three bulging disk and one herniated disk with compress...

Journals about mri(30)

My Undiagnosed Medical Condition


by UndiagnosedLady, Sep 26, 2009 05:51PM - 4 Comments
I JUST WANTED TO SHARE MY STORY BECAUSE I AM SO DESPARATE SCARED. I have seen a chirop...

Please, I really need help!!!!


by Please_Help950, Jun 27, 2009 06:43PM - 12 Comments
If you have read either or all of my previous journal entries, "Hoping For Help (...

Initial H&P, MRI, MRA, MRV done, Rx


by Tibbar62, Jun 24, 2009 12:00AM
Saw Dr Robin Morgan - Pediatric Neurologist. Will call for f/u on scans H&P per ...

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