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Radiology

Chapter 6 Vocab

TermDefinition
Collimation The restriction of the useful beam to an appropriate size.
Added Filtration Added to the inherent filtration built into the x-ray machine. In the form of thin disks of pure aluminum.
Inherent Filtration Filtration built into the x-ray machine by the manufacturer.
Total Filtration The combination of inherent and added filtration in an x-ray machine.
Half Value Layer Thickness of a specified material that, when introduced into the path of a given beam of radiation, reduces the exposure rate by half.
Lead Apron Protectie barrier made of lead or lead-equivalent material. Shields patient from during dental x-ray exposures.
Maximum Permissible Dose (MPD). Maximum accumulated dose that persons who are occupationally exposed may have at any given time of their life.
Optically Stimulated Luminescence (OSL). A personel radiation monitor that absorbs radiation similar to TLD, but crystals release energy during optical stimulation instead of heat.
Primary Beam The original undeflected useful beam of radiation that emanates at the focal spot of the x-ray tube and emerges through the aperture of the tube head.
Radiation Worker A radiographer or professional who works with or around ionizing radiation or equipment that produces ionizing radiation.
Scatter Radiation Radiation that has been deflected from its path by impact during its passage through matter.
Thermoluminescent Dosimeter (TLD). Monitoring device containing certain crystalline compounds that store energy when struck by x-rays. When heated the crystals give off light in proportion to the amount of radiation exposure.
Thyroid Collar An attached or detachable supplement to the lead apron.
Created by: Strobelight95
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