Open AccessComparison of commercially available three‐dimensional treatment planning algorithms for monitor unit calculations in the presence of heterogeneities
Author(s) -
Butts Joseph R.,
Foster Alvis E.
Publication year - 2001
Publication title -
journal of applied clinical medical physics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.83
H-Index - 48
ISSN - 1526-9914
DOI - 10.1120/jacmp.v2i1.2625
Subject(s) - imaging phantom , pinnacle , algorithm , focus (optics) , convolution (computer science) , superposition principle , radiation treatment planning , computer science , fast fourier transform , physics , set (abstract data type) , nuclear medicine , mathematics , medical physics , optics , artificial intelligence , mathematical analysis , medicine , radiation therapy , artificial neural network , programming language
This study uses an anthropomorphic phantom and its computed tomography (CT) data set to evaluate monitor unit (MU) calculations using the CMS Focus Clarkson, the CMS Focus Multigrid Superposition Model, the CMS Focus FFT Convolution Model, and the ADAC Pinnacle 3 Collapsed Cone Convolution Superposition Algorithms. Using heterogeneity corrections, a treatment plan and corresponding MU calculations were generated for several typical clinical situations. A diode detector, placed in an anthropomorphic phantom, was used to compare the treatment planning algorithms' predicted doses with measured data. Differences between diode measurements and the algorithms' calculations were within reasonable levels of acceptability as recommended by Van Dyk et al . [Int. J. Rad. Onc. Biol. Phys. 26 , 261–273 (1993)], except for the CMS Clarkson algorithm, which predicted too few MU for delivery of the intended dose to chest wall fields. PACS number(s): 87.53.Bn, 87.53.Dq