How the MRI works

The MRI, an abbreviation for magnetic resonance imaging, uses magnetic signals, rather than X-rays to create image "slices" of the human body (Edwards). Like all imaging techniques, the MRI creates images based on differences between types of tissues. The MRI shows us the different tissues, and thus creates an image inside the body. An MRI is often used to study nerves, muscles, ligaments, bones, and other tissues in the body; the detail of the study can be quite incredible. An MRI is often used to evaluate the possibility of injuries to ligaments and tendons. Problems in the spine, such as a disc herniation are seen well on an MRI image (Magnetic). Masses and tumors within soft tissues can also be evaluated with MRI. An MRI is also often used to obtain specific diagnostic information not already provided by other imaging technologies such as ultrasound, computed tomography, and nuclear medicine. MRI may be needed to rule out disease and to facilitate medical, surgical, and other treat...