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Evaluation of a commercial three‐dimensional electron beam treatment planning system
Author(s) -
Ding G. X.,
Cygler J. E.,
Zhang G. G.,
Yu M. K.
Publication year - 1999
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 - 10.1118/1.598795
Subject(s) - imaging phantom , monte carlo method , cathode ray , electron , computational physics , monitor unit , beam (structure) , radiation treatment planning , homogeneous , cold spot , dosimetry , physics , atomic physics , materials science , nuclear medicine , optics , statistical physics , nuclear physics , mathematics , statistics , medicine , astrobiology , radiation therapy
We evaluated a commercial three‐dimensional (3D) electron beam treatment planning system ( CADPLAN V.2.7.9 ) using both experimentally measured and Monte Carlo calculated dose distributions to compare with those predicted by CADPLAN calculations. Tests were carried out at various field sizes and electron beam energies from 6 to 20 MeV. For a homogeneous water phantom the agreement between measured and CADPLAN calculated dose distributions is very good except at the phantom surface. CADPLAN is able to predict hot and cold spots caused by a simple 3D inhomogeneity but unable to predict dose distributions for a more complex geometry where CADPLAN underestimates dose changes caused by inhomogeneity. We discussed possible causes for the inaccuracy in the CADPLAN dose calculations. In addition, we have tested CADPLAN treatment monitor unit and electron cut‐out factor calculations and found that CADPLAN predictions generally agree with manual calculations.
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