foundations of radiography, radiographic equipment and safety
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| concept of radiation protection that states that all exposures should be kept as low as reasonably achievable | ALARA concept
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| the positive electrode in the x-ray tube | anode
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| the basic unit of matter | atom
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| the negative electrode in the x-ray tube | cathode
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| x-rays at the center of the beam | central ray
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| differences in degrees of blackness on a radiograph | contrast
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| the portion of the x-ray unit that contains the master swithc , the indicator light, the selector buttons, and the exposure button | control panel
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| the overall darkness or blackness of a radiograph | density
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| the process of making radiographs of the teeth and adjacent structures by exposure to radiographs | dental radiography
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| change in the size of an image on a radiograph caused by incorrect vertical angulation | distortion
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| the amount of energy absorbed by tissues | dose
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| a negatively charged particle in the atom | electron
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| the ability to do work | energy
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| flexible arm that is attached to the x-ray tubehead | extension arm
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| effects of radiation that are passed on to future generations through genetic cells | genetic effects
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| an electrically charge particle | ion
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| process by which electrons are removed from atoms, causing the harmful effects of radiation in humans | ionization
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| radiation that produces ionization, resulting in harmful effects | ionizing radiation
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| highest voltage of radiograph tube used during a radiograph exposure | kilovoltage
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| time between exposure to ionizing radiation and appearance of symptoms | latent period
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| device used to protect the reproductive and blood forming tissues from scatter radiation | lead apron
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| the proportional enlargement of a radiographic image | magnification
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| components of control panel | master switch, indicator light, selector buttons, exposure button
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| anything that occupies space and has form or shape | matter
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| one one thousandth of an ampere, a unit of measurement used to describe the intesity of an electrical current | milliampere
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| the blurred or indistinct area that surrounds an image | penumbra
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| a minute bundle of pure energy that has no weight or mass | photon
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| the most penetrating beam produced at the target of teh anode | primary beam
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| same as primary beam | primary radiation
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| forms of waves of energy emission through space or material | radiation
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| image produced on photosensitive film by exposing the film to radiation and then processing it | radiograph
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| the science or study of radiation as used in medicine | radiology
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| a form of secondary radiation that occurs when an x-ray beam has been deflected from its path by interaction with matter | scatter radiation
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| x-radiation that is created when the primary beam interacts with matter | secondary radiation
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| a measure of how well the radiograph reproduces the fine details or outlines of an object | sharpness
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| 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
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| a flexible lead shield that is placed securely around the neck | thyroid collar
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| the part of the x-ray unit that contains the x-ray tube, the high voltage and low voltage transformers, and insulating oil | tubehead
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| a focal spot in the anode | tungsten target
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| high energy ionizing electromagnetic radiation | x-radiation
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