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Extended expression for tissue‐maximum ratio fitted to the Varian Clinac‐4 and Clinac‐6 accelerators
Author(s) -
ChiuTsao SouTung,
Lerch Irving A.,
Barish Robert J.
Publication year - 1977
Publication title -
medical physics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.473
H-Index - 180
eISSN - 2473-4209
pISSN - 0094-2405
DOI - 10.1118/1.594345
Subject(s) - linear particle accelerator , nuclear medicine , expression (computer science) , dosimetry , physics , computer science , medicine , optics , beam (structure) , programming language
An expression which generates tissue maximum ratio (TMR) data for the Varian Clinac‐4 and Clinac‐6 accelerators is presented. This semiempirical expression can be programmed easily for radiotherapy computer systems or the new generation of scientific calculators. Our technique leads to good agreement with the published data, as demonstrated by a total average percent deviation of the measured TMR values of −0.115% for the Clinac‐4 and −0.002% for the Clinac‐6.