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DENTAL RADIOGRAPHY PRINCIPLES AND TECHNIQUES CHAPTER 1
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DENTAL RADIOGRAPHY PRINCIPLES AND TECHNIQUES CHAPTER 1
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DENTAL RADIOGRAPHY PRINCIPLES AND TECHNIQUESCHAPTER 1
1. Radiation: A form of energy carried by waves or a stream of particles
2. X-Radiation: a high-energy radiation produced by the collision of a beam of electrons
with a metal target in an X-ray tube
3. Radiology: The science or study of radiation as used in medicine, a branch of medical
science that deals with the therapeutic use of x-rays, radioactive substances, and other
forms of radiant energy.
4. Radiograph: an image or picture produced on a receptor (radiation-sensitive film,
phosphor plate, or digital sensor) by exposure to ionizing radiation; a two-dimensional
representation of a three-dimensional object
5. Dental radiograph: A photographic image produced on a receptor by the passage of
x-rays through teeth and related structures
6. radiography: The art and science of making radiographs by the exposure of a
receptor to x-rays
7. Dental radiography: The production of radiographs of the teeth and adjacent
structures by the exposure of an image receptor to x-rays
8. Dental radiographer: Any person who positions, exposes, and processes dental x-ray
image receptors
9. Image: a picture or likeness of an object
10. Image receptor: A recording medium; examples include x-ray film, phosphor plate,
or digital sensor
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, 11. Dental imaging: the creation of digital, print, or film representations of anatomic
structures for the purpose of diagnosis
12. Who discovered X-rays: Wilhelm Conrad Roentgen
13. When was X-rays discovered: November 8, 1895
14. Before he discovered X-rays, what did Roentgen experimented on: Cathode rays
15. What did Roengten use in his experiment: A vacuum tube, an electrical current and
special screens covered with material that glowed(fluoresced) when exposed to
radiation
16. What observations did roentgen make about cathode rays: -The rays appeared as
streams of colored light passing from one end of the tube to the other
-The rays did not travel far outside the tube
-The rays caused the fluorescent screens to glow
17. During his experiment what did roentgen replace the fluorescent screens with: A
photographic plate
18. How did roentgen make the first radiograph of the human body: He places his
wife's hand on a photographic plate and exposed it to an unknown green ray for
15 minutes. He was able to see the outline of the bones of her hand
19. What did roentgen name the unknown green ray: X-ray since X represents
something unknown in mathematics
20. Besides the discovery of X-rays, what else did roentgen do: He published 3
scientific papers about the discovery, properties and characteristics of x-rays.
21. What did roentgen win: He was awarded many honors including the first Nobel
Prize ever awarded in physics.
22. Who built the first vacuum tube in 1838: Heinrich Geissler
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