| Flap 1 |
Flap 2 |
| 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 |
