CT SCANS Malari Lapp

Who?

Godfrey Hounsfield

Left school

Had no qualifications

Awarded Nobel Prize in 1979

When?Developed in 1972

Revolutionized diagnostic medicine

First only developed for head scans

Took days to construct a single image

What Computed Tomography (CT) imaging is also

known as "CAT scanning" (Computed Axial Tomography).

Tomography is from the Greek word "tomos" meaning "slice" or "section"

"graphia" meaning "describing".

WhyFor diagnostic purposes

Doctors wanted a better way to look at the inside of people

Noninvasive

Better for the patient

How it works

Produce X-rays

Visible light photons

High energy levels allow beams to pass through the body

. . .

Patient lies down on a platform

Slowly moves through the machine

Motor turns X-ray tube

Revolve around body

Preparation

There are a few things a patient may be asked to do

Drink something

Avoid certain foods

Dye injected

Risks?CT scans expose the patient to radiation.

a single CT scan subjects the human body to between 150 and 1,100 times the radiation of a conventional x-ray

29,000 future cancer cases could be attributed to the 72 million CT scans performed in the country in 2007

Citation

"How Much Do CT Scans Increase the Risk of Cancer?" Scientific American Global RSS. N.p., n.d. Web. 09 Nov. 2014.

"CT Scan." Definition. N.p., n.d. Web. 08 Nov. 2014.

"Body CT (CAT Scan)." Body CT (CAT Scan). N.p., n.d. Web. 09 Nov. 2014.

http://www.encyclopedia.com/topic/CAT_scan.aspx

http://www.medicinenet.com/cat_scan/article.htm