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32 Cards in this Set
- Front
- Back
ALARA concept |
concept of radiation protection that states all exposure should be kept at "as low as reasonable acheivable" |
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Anode |
The positive electrode in the x-ray |
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Atom |
The basic unit of life |
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Bremsstrahlung radiation |
"Braking radiation" The sudden deceleration of electrons as they interact |
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Cathode |
The negative electrode in the x-ray tube |
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Central ray |
X-rays at the center of the beam |
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Contrast |
Differences in degrees of blackness on an image |
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Control panel |
The portion of the x-ray unit that contains the master switch, the indicator light the selector buttons and the exposure button |
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Density |
The overall darkness or blackness on an image |
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Dental Radiography |
The process of of recording images of the teeth and adjacent structures by exposure to x-radiation |
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Dental imaging |
A filmless method of capturing an image and displaying it by using an image receptor , an electronic signal and a computer to process and store the image |
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Distortion |
change in the size of an image caused by incorrect vertical angulation |
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Dose |
The amount of energy absorbed by tissues |
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Dosimeter |
A device used to detect and measure an accumulated dosage of radiation |
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Electron |
A negatively charged particle in the atom |
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Energy |
the ability to do work |
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Extension |
Flexible arm that is attached to the x-ray tubehead |
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Image receptor |
A recording medium for an image, normally film, phosphor storage plate(psp) or a digital sensor |
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Intensity |
The total energy of the x-ray beam |
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Ion |
An electrically charged particle |
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Ionization |
Process by which electrons are removed from atoms, causing harmful effects of radiation in humans |
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Ionizing |
Radiation that produces ionization resulting in harmful effects |
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Kilovoltage |
Highest voltage of x-ray tube used in during an exposure |
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Milliampere |
One one-thousand (1/1000) of an ampere, a unit of measurement used to describe the instensity of an electrical current |
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Penumbra |
The blurred or distinct area that surrounds an image |
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Photon |
A minute (tiny) bundle of pure energy that that has no weight or mass |
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Primary beam/radiation |
The most penetrating beam produced at the target of the anode |
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Radiation |
forms of waves of energy emission through space or material |
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Scatter radiation |
A form of secondary radiation that occurs when an x-ray beam has been deflected from its paths by interaction with matter |
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Secondary radiation |
Radistion that is created when the primary beam interacts with matter |
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Tubehead |
The part of teh x-ray unit that contains the x-rays tube, the high voltage and low -voltage transformers and insulating oil |
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Tungsten target |
A focal spot in the anode |