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Radiology

ch.1 intro/ history

QuestionAnswer
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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