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Table. 3.

Table. 3.

Comparison between the gamma passing rate results of PD and MobiusFX for patient-specific QA in IMRT and VMAT

LINAC machine Factor Gamma passing rates (%) Difference between paired data

Mean±standard deviation Standard error P-value of paired t-test
Novalis Tx
#1 PD (3%/3 mm) 97.53±3.34 −2.07±2.95 0.39 <0.001
PD (5%/3 mm) 99.61±0.74
#2 PD (3%/3 mm) 97.53±3.34 1.07±14.27 1.89 0.571
MobiusFX (5%/3 mm) 96.45±13.94
VitalBeam
#1 PD (3%/3 mm) 99.43±1.02 −0.49±0.86 0.10 <0.001
PD (5%/3 mm) 99.92±0.22
#2 PD (3%/3 mm) 99.43±1.02 0.10±2.05 0.25 0.678
MobiusFX (5%/3 mm) 99.32±1.87

PD, portal dosimetry; QA, quality assurance; IMRT, intensity-modulated radiotherapy; VMAT, volumetric modulated arc therapy; LINAC, linear accelerator.

Progress in Medical Physics 2021;32:107-15 https://doi.org/10.14316/pmp.2021.32.4.107
© 2021 Progress in Medical Physics