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Unformatted text preview: CAT Scan What is a CAT Scan?
A CAT scan uses x-rays to take pictures of your skull and brain. The patient lies in a tunnel-like machine. The inside of the machine rotates and takes x-rays of the head from different angles, which are later used by computers to make an image of a "slice" (or cross-section) of the brain. First CAT Scan The invention of the CAT scan can be attributed to two men; Godfrey Newbold Hounsfield and Allan Cormack. Cormack - derived the mathematical basis of CAT scanning in 1963-64 Hounsfield in 1972 Hounsfield built the first CAT scan How does a CAT Scan work? A CAT Scan is based on the same principles as regular x ray. The xrays are absorbed differently by the different parts of the body. Bone absorbs the most xrays, so the skull appears white on the image. Water absorbs little, and appears black. The brain has intermediate density and appears grey. What are CAT Scans used for? CAT scans are performed to analyze the internal structures of the body. This includes the head, where traumatic injuries may occur and the spinal cord. CAT scans produce extremely accurate images of body structures in addition to guiding the radiologist in performing certain procedures, such as biopsies of suspected cancers. What are the risks?
A CAT scan is a very low-risk procedure. The most common problem is an adverse reaction to intravenous contrast material. Intravenous contrast is usually an iodine-based liquid given in the vein, which makes many organs and structures, such as the kidneys and blood vessels much more visible on the CAT scan. There may be resulting itching, a rash, hives, or a feeling of warmth throughout the body. References CAT SCAN www.colorado.edu/physics/2000/tomograp hy/ How CAT Scans workhttp://science.howstuffworks.com/cat scan.htm CAT Scan/CT Scan http://www.medicinenet.com/CAT_Scan/art icle.htm ...
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This note was uploaded on 04/15/2008 for the course COMP CETU311 taught by Professor Butler during the Spring '08 term at Northeastern.
- Spring '08