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LRA 215 FINAL EXAM GRADED A+
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LRA 215 FINAL EXAM GRADED A+
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LRA 215 FINAL EXAM GRADED A+Linear Energy Transfer (LET) - ANS-measure of the rate at which energy is transferred from ionizing radiation to soft tissue. expressed in kiloelectron volts per micrometer of soft tissue
Oxygen Enhancement Ratio (OER) - ANS-ratio of the dose necessary to produce a given effect under anoxic conditions to the dose necessary to produce the same effect under aerobic conditions
threshold dose - ANS-dose below which a person has a negligible chance of sustaining specific biologic damage, or dose at which response to increasing x-ray intensity first occurs
interphase death - ANS-occurs when the cell dies before replicating
radiation weighting factor - ANS-factor used for radiation protection that accounts for differences in biologic effectiveness between different radiations. formerly called quality factor
tribondeau - ANS-one of two french scientists, who in 1906, had a theory that became a
law, stating that metabolic and maturation state of tissues vary for being affected with radiosensitivity
What is the formula for relative biological effectiveness - ANS-RBE=Dose of standard radiation necessary to produce a given effect/ dose of test radiation necessary to produce the same effect
how does age affect the radiosensitivity of tissue? - ANS-in utero, at birth and during childhood, our structures are still being formed which makes us more sensitive to radiosensitivity. when you reach adulthood you are less prone to radiosensitivity. however it is always important to make sure you're reproductive organs are covered when necessary
a dose of 10 Gy given to a patiet in 5 doses of 2 Gy per day is a _____ dose - ANS-
fractionated
Humans are most radiosensitive during ____ - ANS-fetal stages
Which dose-response relationship can follow a sigmoid curve? - ANS-Nonlinear-
nonthreshold
Tissue is ___ radiosensitive under high oxygen conditions and ___ radiosensitive under hypoxic conditions - ANS-more, less
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