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actinic of or pertaining to the chemical property of ultraviolet radiation and x-rays that produces photochemical effects.
actinic rays electromagnetic radiation, such as x-rays or ultraviolet light, that can produce an image on a photographic emulsion.
arteriography examination of the arteries by x-ray after injection with a radiopaque dye.
barium sulfate an opaque insoluble white powder that is used as a pigment in paints and a filler for plastics and textiles, and is swallowed as a diagnostic aid in x-ray examination of the stomach and intestines.
bremsstrahlung electromagnetic radiation, such as x-rays, produced by the sudden deceleration or acceleration of an electron caused by its approach to an atomic nucleus.
CAT scan a cross-sectional image formed by a computerized combination of x-rays taken along a selected axis of the body, used as a diagnostic tool in medical treatment; computerized axial tomography scan.
dental hygienist a licensed specialist in preventive dental care, whose practice includes cleaning and x-rays, and who often works in a dentist's office.
dosimeter a portable instrument that measures amounts of radiation, such as gamma rays or x-rays, to which a person has been exposed.
electromagnetic wave a wave that contains a magnetic and electric component and that is created by an accelerating electric charge, such as a radio wave, x-ray, or light.
encephalogram an x-ray photograph of the spaces of the brain normally filled with cerebrospinal fluid, partially replaced for the procedure by air or dye.
fluorescence the giving off of electromagnetic radiation, esp. in the form of visible light, during or after exposure to radiation from another source such as ultraviolet light or x-rays. [1/2 definitions]
fluoroscope a fluorescent screen used with x-rays or other radiation for viewing the internal structure of opaque objects such as the human body.
mammogram an x-ray picture of the breast, usu. made to check for cancerous growths.
mammography photography of the breast by x-ray, usu. for detection of cancerous growths.
myelogram an x-ray photograph of the spinal cord that is taken after a radiopaque substance has been administered.
pneumoencephalogram an x-ray of the spaces in the brain that contain fluid, after the replacement of the cerebrospinal fluid by air or gas.
radiation sickness sickness induced by overexposure to ionizing radiation such as x-rays or gamma rays, resulting in nausea, diarrhea, bleeding, hair loss, sterility, and often death.
radio- radiant energy; x-rays. [1/3 definitions]
radiogram an x-ray print; autoradiogram; radiograph. [1/2 definitions]
radiograph an image produced by the action of x-rays or other forms of radiation on a photographic film; autoradiogram; radiogram. [2 definitions]
radiology the branch of medicine dealing with the examination of bones and internal organs using imaging techniques such as x-rays, ultrasound, and magnetic resonance. [2 definitions]