Basic Research on Comparative Evaluation of Calculated Dose Distribution Using Monte Carlo Algorithm-equipped Treatment Planning Systems in Volumetric Modulated Arc Therapy

Purpose The purpose was to study comparative evaluation of calculated dose distribution by X-ray Voxel Monte Carlo (XVMC) for calculation in Acuros XB (AXB). commissioning and head neck volumetric modulated arc therapy (VMAT) clinical cases were compared AXB Eclipse XVMC Monaco. Methods For TrueBeam at 6 MV, we the simple rectangle, heterogeneity correction, multileaf collimator (MLC) characteristics. 15 computation times, accuracy, dose-volume histogram (DVH), 3D-γ analysis (γ 3%/2 mm). Results There no difference between values jaw field, measurement errors both within± 1%, profiles water, bone, lung equivalent slab phantoms good agreement. transmission, tongue groove effect, there a less than 10% leaf-end transmission. In cases, time half that AXB, average two calculations -1.17±2.14%, error (AXB: -0.73±0.79%, XVMC: -0.07±1.21%). DVH, max doses about 3% higher planning target volume (PTV) gross tumor (GTV), but pass rate overall 95.11±2.59%, which Conclusions Both algorithms equivalent, suggesting Monaco is verification method with high accuracy distribution.