DPM as a radiation transport engine for PRIMO

Radiation Oncology

Table 3 Simulation times in minutes for PENELOPE and pDPM to obtain a dose distribution with 1% standard statistical uncertainty for some single field cases and dynamic treatments

		Simulation time [min]			Speedup
			pDPM
Test case	Voxel size [cm³]	penelope	Original voxel	Coarse voxel	Original voxel	Coarse voxel
Described in “Photon transport in a multi-layer phantom” section	0.5×0.5×0.25	37	9.5	-	3.9×	-
Described in “Photon transport in a MLC” section	0.2×0.2×0.5	324	129	-	2.5×	-
Head&Neck VMAT, 194 CP	0.19×0.15×0.19	1061	140	42	7.6×	25.3×
Lung VMAT, 194 CP	0.19×0.14×0.19	331	28	14	11.8×	23.6×
Brain VMAT, 354 CP	0.11×0.2×0.11	687	117	34	5.8×	20.2×
Prostate IMRT, 621 CP	0.18×0.25×0.18	472	64	45	7.3×	10.5×

Clinical cases were simulated with the same voxel size of the original CT scan (original voxel), for both penelope and pDPM. Simulation times with pDPM for the clinical cases in which the coarse voxel size of (0.25 cm)³ was employed are reported in the corresponding column. The speedups of pDPM with respect to penelope for the simulation with the original voxel size are given in the Original voxel column. The speedup obtained with the coarse option of pDPM is also reported. CP stands for control point

ISSN: 1748-717X