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radiation produced from xray photon interactions with matter where resulting photons continue in a different direction
kilovoltage peak (kVp)
potential difference; controls penetrating ability; quality of photons produced by xray tube
inverse square law
the intensity of a beam of radiation is inversely proportional to the square of its distance from the source
nondiagnostic radiation that travels in different direction after interacting with the patients body
any combination of mA x time producing equal mAs values should produce equal exposures and densities
classic coherent scatter
lower energy photon interacts with atom; same energy released in different direction; no energy transferred to patient
high energy photon knocks out inner shell electron; complete absorption of energy
high energy photon interacts with nucleus; produces two elextrons at 180 degrees from each other
measure of dose equivalence and biological damage; absorbed dose x quality factor; 1 sv = 100 rem
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