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Radiology
ch.1 intro/ history
| Question | Answer |
|---|---|
| define radiation | a form of energy carried by waves or a stream of particles |
| define x-radiation | high energy radiation produced by the collision of a beam of electrons with a metal target in an x-ray tube |
| define x-ray | abeam of energy that has the power to penetrate substances and record image shows on photograpic film |
| define radiology | science or study of radiation |
| define dental radiograph | photographic image produced on film by the passage of x-rays through teeth and related structures |
| define dental radiographer | any person that positions, exposes, and processes dental x-ray film |
| 6 important reasons for dental radiographs | 1detect lesions 2 localize lesions/ foreign objects 3provide info during procedures (rct) 4evaluate growth & development 5 illustrate changes secondary to caries, perio & trauma 6document the condition of pt at specific point in time |
| discovered x-rays give: name, career, date discovered, object used for 1st film | Wilhelm Roentgen, bavarian physicist, 11/8/1895, wife's hand for 15 min |
| why did Roentgen give name x-ray | b/c x refers to the unknown as in math |
| Otto Walkhoff: career, what contribution to dentistry related to x-rays | german dentist, took first dental radiograph on self in 1896- took 25min |
| Dr. Kells contribution to x-ray technology | credited for first practical use of dental fillms, exposed hands to nemerous x-rays every day for years, lost fingers, hands, then arm |
| Dr. Rollins contribution to x-ray tech | 1901 developed first dental x-ray unit, radiation burn on his arm resulted in study of radiation protection, first wrapped dental film |
| William Collidge contribute to x-ray tech | electrical engineer developed first hot cathode x-ray tube w/ tungsten filament, first prototype for modern x-ray tubes, hs prototype revolutionezed the generation of x-rays |
| Victor X-Ray Corp first dental x-ray machine produced in yr/ type | 1923 tube head with oil introduced |
| GE contribution to x-ray unit | 1933introduced improved version of Victor X-ray machine immersed in oil, has been little change since then |
| GE introduces new feature 1957 | variable kilovoltage |
| 1966 new feature for tubehead | recessed long-beam tubehead introduced |
| film hx: 1896-1913 | glass photographic plates hand wrapped |
| film hx: 1913 | Kodak introduced pre-wrapped film |
| film hx: 1920 | machine produced pre-wrapped film |
| technique hx: 1904 technique, improved by dentist in 1925 | bisect technique |
| technique hx: introduced by Kells in 1896, improved in 1920, improved again w/ long cone in 1947 | paralleling technique |
| panoramic film introduced where/ when | Japan/ 1933 |
Created by:
ShellyA&P
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