relative biologic effectiveness


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rel·a·tive bi·o·log·ic ef·fec·tive·ness (RBE),

a factor used to compare the biologic effect of absorbed doses of different types and energies of ionizing radiation. It is determined by the ratio of an absorbed dose of the particular radiation in question to the absorbed dose of a reference radiation required to produce an identical biologic effect in a specific organism, organ, or tissue.

relative biologic effectiveness (RBE)

[rel′ətiv]
Etymology: L, relatio
a measure of the cell-killing ability of a particular radiation compared with that of 250 keV x-rays. The ratio of the number of cells killed with the test radiation over the number killed with the 250 keV radiation is the RBE.

rel·a·tive bi·o·log·ic ef·fec·tive·ness

(rel'ă-tiv bī'ŏ-loj'ik e-fek'tiv-nĕs)
A factor used to compare the biologic effect of absorbed doses of different types and energies of ionizing radiation. It is determined by the ratio of an absorbed dose of the particular radiation in question to the absorbed dose of a reference radiation required to produce an identical biologic effect in a specific organism, organ, or tissue.
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