Hosp. diagnostics

MRIS

A CT (or "CAT") scan produces (via computer manipulation) a three dimensional image of the inside of an object, usually the human body. It does so by taking a series of two dimensional x-ray images while rotating the camera around the patient. The issue with CT scans is that they use x-rays, and high doses of radiation can be harmful causing damage that is cumulative over time. An MRI on the other hand (Magnetic Resonance Imaging), uses powerful magnetic fields to generate its images so there is no exposure to ionizing radiation (such as X-rays). We used MRI equipment in our chemistry labs at school, way back in the days when the technology was still called Nuclear Magnetic Resonance Imaging (NMRI). Apparently the marketing folks didn't like the term "nuclear" because of its association with atomic bombs, so now it's just called MRI.

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