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Radiology Exam 1

QuestionAnswer
Radiation Energy carried by waves or streams of particles
X-radiation high-energy produced by the collision of a beam of electrons with a metal target in an x-ray tube
X-ray A beam of energy that has the power to penetrate substances and record images shadows on photographic film
Radiology the science or study of radiation used in medicine
Radiograph A picture on film produced by the passage of x-rays through an object or body
Dental radiographs a photographic image produced on film by passage of x-rays through teeth and related structures
Radiography the art and science of making radiographs by the exposure of film to x-rays
Dental radiography the production of radiographs of the teeth and adjacent structures by the exposure of film to x-rays
Image a picture of likeness of an object
Image receptor a recording medium ; x-ray film, phosphor plates, digital sensro
Imaging, dental the creation of digital, print, or film representations of anatomic structures for the purpose of diagnosis
Detection one of the most important uses of dental imaging
Wilhelm Conrad Roentgen Father of x-rays
Heinrich Geissler Built the first vacuum tube
Johann Hittorf Used the vacuum to study florescence
William Crookes Discovers that cathode rays were streams of charged particles
Philip Lenard Discovered that cathode rays could penetrate a thin window of aluminum foil
Otto Walkhoff Made the first dental radiograph
W.J Morton Made the first radiograph using a skull
C. Edmund Kells Exposed the first dental radiograph in the United States using a living person
William Rollins Developed the first dental x-ray unit
Frank Van Woert First to use film in intraoral radiography
Howard Raper Established the first college radiography course Refined original bisecting technique and introduced bite-wing technique
William Coolidge Developed the first hot-cathode x-ray tube
Eastman Kodak Manufactures pre-wrapped intraoral film
Weston Price Bisecting technique
F. Gordan Fitzgerald Introduction of the long-cone paralleling technique
Hisatugu Numata First to expose a panoramic radiograph
Yrjo Paatero Experimented with a slit beam of radiography, intensifying screens, and rational techniques
Primary Radiation the penetrating x-ray beam that is produced at the target of the anode
Secondary Radiation x-radiation created when the primary beam interacts with matter
Receptor holder helps align for pictures
Collimating device restricts radiation beam size
Ionization produced through the photoelectric effect or Compton scatter
Free radical formation Formed when an x-ray photon ionizes water
Direct Theory Cell damage results when ionizing radiation directly hits critical areas within the cell
Indirect Theory X-ray photons are absorbed within the cell and cause the formation of toxins, which in turn indirectly damage the cell
Stochastic effects occur as a direct function of the dose, probability of occurence increases with increasing absorbed dose
Non stochastic effects Have a threshold and the effects increase in severity with increasing absorbed dose
Short term effects associated with large doses of radiation in a short amount of time
Long term effects associated with small doses of radiation absorbed repeatedly over a long period of time
Radiosensistive a cell that is sensitive to radiation
Radio resistant a cell that is resistant to radiation
Radiosensitive cells blood cells, immature reproductive cells, young bone cells Lymphoid tissue, bone marrow, testes, intestines
Radio resistant cell cells of bone, muscle and nerve salivary glands, kidney, liver
Created by: brodskykropf
 

 



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