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Ch 38 foundations KT

foundations of radiography, radiographic equipment and safety

QuestionAnswer
concept of radiation protection that states that all exposures should be kept as low as reasonably achievable ALARA concept
the positive electrode in the x-ray tube anode
the basic unit of matter atom
the negative electrode in the x-ray tube cathode
x-rays at the center of the beam central ray
differences in degrees of blackness on a radiograph contrast
the portion of the x-ray unit that contains the master swithc , the indicator light, the selector buttons, and the exposure button control panel
the overall darkness or blackness of a radiograph density
the process of making radiographs of the teeth and adjacent structures by exposure to radiographs dental radiography
change in the size of an image on a radiograph caused by incorrect vertical angulation distortion
the amount of energy absorbed by tissues dose
a negatively charged particle in the atom electron
the ability to do work energy
flexible arm that is attached to the x-ray tubehead extension arm
effects of radiation that are passed on to future generations through genetic cells genetic effects
an electrically charge particle ion
process by which electrons are removed from atoms, causing the harmful effects of radiation in humans ionization
radiation that produces ionization, resulting in harmful effects ionizing radiation
highest voltage of radiograph tube used during a radiograph exposure kilovoltage
time between exposure to ionizing radiation and appearance of symptoms latent period
device used to protect the reproductive and blood forming tissues from scatter radiation lead apron
the proportional enlargement of a radiographic image magnification
components of control panel master switch, indicator light, selector buttons, exposure button
anything that occupies space and has form or shape matter
one one thousandth of an ampere, a unit of measurement used to describe the intesity of an electrical current milliampere
the blurred or indistinct area that surrounds an image penumbra
a minute bundle of pure energy that has no weight or mass photon
the most penetrating beam produced at the target of teh anode primary beam
same as primary beam primary radiation
forms of waves of energy emission through space or material radiation
image produced on photosensitive film by exposing the film to radiation and then processing it radiograph
the science or study of radiation as used in medicine radiology
a form of secondary radiation that occurs when an x-ray beam has been deflected from its path by interaction with matter scatter radiation
x-radiation that is created when the primary beam interacts with matter secondary radiation
a measure of how well the radiograph reproduces the fine details or outlines of an object sharpness
effects of radiation that cause illness and are responsible for poor health such as cancer leukemia and cataracts but are not passed on to offspring somatic effects
a flexible lead shield that is placed securely around the neck thyroid collar
the part of the x-ray unit that contains the x-ray tube, the high voltage and low voltage transformers, and insulating oil tubehead
a focal spot in the anode tungsten target
high energy ionizing electromagnetic radiation x-radiation
Created by: cynthia.fryer on 2011-11-27



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