The C.T. Scan

Paper Summary:

This paper looks at how the C.T. Scanner is a sophisticated type of x-ray machine, which rather than sending out one wide single x-ray sends out a number of beams from various angles simultaneously. It compares the C.T. Scanner with the M.R.I. Scanner, which uses magnets and radio waves instead of radiation and discusses how the M.R.I. Scanner gives greater detail for soft tissues; whereas the C.T. Scanner gives a clearer picture of the bones.

From the Paper:

"Research also shows that Robert Ledley was the first person to devise a scanner that was able to scan the whole body. This was to revolutionize diagnostic medicine. The first model, that was actually used for diagnosis and built by Doctor Ledley was called an A.C.T.A .Scanner and was used clinically at Georgetown University Hospital in the USA from 1974 - 1978. This machine is now a part of the Smithsonian Institution's National Museum of American History. According to the Encyclopedia Britannica Almanac, 2003, the mathematical base of CAT screening was devised in 1963-64 by Allan Cormack of the United States and the first C.T. scan machine was built in 1972 by Godfrey Hounsfield of the U.K.."

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