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Evaluation of a photon and an electron beam of a 6‐MV linear accelerator
Author(s) -
Sharma Subhash C.,
Modur Prabakar,
Basavatia Ram
Publication year - 1988
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 - 10.1118/1.596203
Subject(s) - linear particle accelerator , dosimetry , monitor unit , cathode ray , beam (structure) , physics , particle accelerator , wedge (geometry) , electron , nuclear medicine , photon , optics , nuclear physics , medicine
The first Mitsubishi medical linear accelerator in the United States was commissioned in April 1985. This unit EXL‐8 (marketed by Mitsubishi International Corporation) produces 8‐MeV electron beams in addition to 6‐MV x rays. It is a 100‐cm source–axis distance isocentric machine. Acceptance testing and performance evaluation of this accelerator were completed. Our measurements included beam characteristics and dosimetry parameters for both modalities. Central axis % depth dose (% DD), tissue‐maximum ratio, field size output factors, wedge factors, etc., for this Linac 6‐MV beam are reported. Characteristics of the 8‐MeV electron beam, namely % DD data, isodose curves, and cone ratios for various electron applicators are presented.