Multi-institutional evaluation using the end-to-end test for implementation of dynamic techniques of radiation therapy in Thailand

Abstract

Quality assurance Accuracy End-to-end test and the dose distribution from the radiochromic films. The global gamma indices of the measurement doses and the treatment planning system calculation doses were compared. Results: The large majority of the RT centers (6/8) fulfilled the dosimetric goals, with the measured and calculated doses at the specification points agreeing within ±3% for PTV and ±5% for OARS. At 2 centers, TPS underestimated the lung doses by about 6% and spinal cord doses by 8%. The mean percentage gamma pass rates for the 8 centers were 98.29 ± 0.67% (for the 3%/3 mm criterion) and 96.72 ± 0.84% (for the 2%/2 mm criterion). Conclusions: The 8 participating RT centers achieved a satisfactory quality level of IMRT/VMAT clinical implementation.