scatter air ratio

(redirected from scatter-air ratio)

scatter air ratio

, scatter-air ratio
In radiation therapy, the ratio between the primary radiation and scatter in air at the point of calculation along the central ray of the treatment beam. Dosimetrists use this ratio and algorithms for irregular fields when preparing radiation therapy treatment plans.
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References in periodicals archive ?
The concept of this dosimetry of Area Integration Algorithm (Irregular Field program) involves the use of tissue-maximum ratio and scatter-maximum ratio which is analogous to tissue-air ratio (TAR) and scatter-air ratio concepts.