1970-1980

Students #3 and #25 Category:Medical Invetion: Cat scan Invetor: Godfrey Newbold Hountfield and Allan Mclead Comorack The cat scan was invented in 1972 by Godfrey Newbold Hounfield of EMI Laboratories. At the same time the cat scan was created by Allan Mclead Cormack of Tuft University. Computed axial tomography, commonly referred to as CAT scans or CT scans, creates three-dimensional images from the two-dimensional X-ray pictures.The first CAT scan machine took 4.5 minutes of scanning and 1.5 minutes of processing to produce one slice. A slice is a single three dimensional X-ray image produced by a CAT scan. Today a slice can be scanned and generated in one second. Over the years, the CAT scan has changed greatly from the amount it takes to scan and the amount of raditation it gives off.

@http://www.odec.ca/projects/2004/sitt4b0/public_html/catscans.htm

What changes were going on in computer history at this period of time? In 1970, the floppy disc appeared and within the next year Intel intoduced the microprocessor. It was referred to as the "computer on a chip". In 1974, the first retail barcode code was scanned. This would change how many stores are run today.

What is happening in the United States at this time? At this time in history, the U.S. was having economic problems. In 1974, the economy was in the worst recession in 40 years. Unemployment rates were higher than the head been since World War II. Unemployment rates jumped from about 5% to 9% in less than a year. This recession lasted until about 1975. Two years later, in 1997, the US admits testing Neutron Bomb. The primary lethal effects of a neutron bomb, also known as an enhanced-radiation weapon, come from the radiation damage caused by the neutrons it emits. Web Page To help restrict weapon violence, in June 18, 1979 the US and the Soviet Union signed SALT II. SALT II restricted the number or strategic offensive weapons.

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The 1970's were a time of war and economic problems for the world. In 1973 World War II began. One of the events that took place during the war was in 1971 U.S. planes bomb Vietcong Supply routes in Cambodia. That spread the war beyond Vietnam. In April 30, 1975 South Vietnam falls under communist forces of North Vietnam. Besides wars going on, in 1973 Arab oil embargo causes severe shortage and energy prices skyrocket. The world was having economic problems at this time.