TY - JOUR
T1 - Comparison of 2D and 3D Gamma calculations for an IMRT QA phantom
AU - Lafratta, R.
AU - Ibbott, G.
AU - Adamovics, J.
AU - Followill, D.
N1 - Publisher Copyright:
© 2015 IOP Publishing Ltd.
PY - 2015
Y1 - 2015
N2 - Gamma index pass rates were evaluated for an anthropomorphic phantom using both 2D and 3D calculations. The phantom was irradiated with the traditional dosimetry insert loaded with radiochromic film and TLD, and then with a 3D dosimetry insert. A comparison with the calculated dose distribution showed that both the PRESAGE® dosimeter and the film and TLD system agreed with the plan to within 5% using 2D gamma index criteria. The 3D gamma index showed a slightly higher pass rate than the 2D gamma index at 3%/3mm, and comparable pass rates using more generous constraints. The acceptable number of pixels passing the tighter constraints (3%/3mm) might be dependent upon the choice between a 2D calculation versus a 3D calculation.
AB - Gamma index pass rates were evaluated for an anthropomorphic phantom using both 2D and 3D calculations. The phantom was irradiated with the traditional dosimetry insert loaded with radiochromic film and TLD, and then with a 3D dosimetry insert. A comparison with the calculated dose distribution showed that both the PRESAGE® dosimeter and the film and TLD system agreed with the plan to within 5% using 2D gamma index criteria. The 3D gamma index showed a slightly higher pass rate than the 2D gamma index at 3%/3mm, and comparable pass rates using more generous constraints. The acceptable number of pixels passing the tighter constraints (3%/3mm) might be dependent upon the choice between a 2D calculation versus a 3D calculation.
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U2 - 10.1088/1742-6596/573/1/012055
DO - 10.1088/1742-6596/573/1/012055
M3 - Conference article
AN - SCOPUS:84946198963
SN - 1742-6588
VL - 573
JO - Journal of Physics: Conference Series
JF - Journal of Physics: Conference Series
IS - 1
M1 - 012055
T2 - 8th International Conference on 3D Radiation Dosimetry, IC3DDose 2014
Y2 - 4 September 2014 through 7 September 2014
ER -