Publication

Basic dosimetric verification in water of the anisotropic analytical algorithm for Varian, Elekta and Siemens linacs

Journal Paper/Review - Jan 1, 2008

Units
PubMed

Citation
Cozzi L, Nicolini G, Vanetti E, Clivio A, Glashörster M, Schiefer J, Fogliata A. Basic dosimetric verification in water of the anisotropic analytical algorithm for Varian, Elekta and Siemens linacs. Zeitschrift für medizinische Physik 2008; 18:128-35.
Type
Journal Paper/Review (English)
Journal
Zeitschrift für medizinische Physik 2008; 18
Publication Date
Jan 1, 2008
Issn Print
0939-3889
Pages
128-35
Brief description/objective

Since early 2007 a new version of the Anisotropic Analytical Algorithm (AAA) for photon dose calculations was released by Varian Medical Systems for clinical usage on Elekta linacs and also, with some restrictions, for Siemens linacs. Basic validation studies were performed and reported for three beams. 4,6 and 15 MV for an Elekta Synergy, 6 and 15 MV for a Siemens Primus and, as a reference, for 6 and 15 MV from a Varian Clinac 2100C/D. Generally AAA calculations reproduced well measured data and small deviations were observed for open and wedged fields. PDD curves showed in average differences between calculation and measurement smaller than 1% or 1.2 mm for Elekta beams, 1% or 1.8 mm for Siemens beams and 1% or 1 mm for Varian beams. Profiles in the flattened region matched measurements with deviations smaller than 1% for Elekta and Varian beams, 2% for Siemens. Percentage differences in Output Factors were observed as small as 1% in average.