Premium
Shaping of photon beams from electron linear accelerators in radiation therapy
Author(s) -
Izewska Joanna
Publication year - 1993
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 - 10.1118/1.597133
Subject(s) - linear particle accelerator , physics , beam (structure) , radiation , photon , particle accelerator , radiation therapy , dosimetry , optics , medical physics , computational physics , nuclear medicine , medicine
The method of calculation of the bremmstrahlung yield and angular distributions based on the semianalytical model described by Kovalev [Vtoricnoe izlucenie uskoritelej elektronov (Atomizdat, Moscow, 1979)] was analyzed. The specially written computer program was used to optimize the geometry of the collimators and the flattening filter design for radiation therapy purposes. The x‐ray beam shaping system thus designed was installed in the 4‐MeV linear Limex accelerator working at the Cancer Center in Warsaw (Poland). By comparing the calculated beam distributions with the experimental data, the agreement between theory and measurements was found to be within about ±3%.