Table 1.

Measured point doses and percent differences between doses measured and calculated by the treatment planning system (TPS) and Mobius3D (M3D) for IMRT and VMAT treatment plans of the AAPM Task Group 119 structure sets. Percent differences are displayed as the mean $\pm \text{standard}$ error ($\mathrm{N}=5$)

	IMRT			VMAT
		% diff			% diff
Location	Measured Dose (cGy)	TPS	M3D	Measured Dose (cGy)	TPS	M3D
Multitarget
Central target	$213.9\pm 0.3$	$‐0.4\pm 0.1$	$‐0.6\pm 0.1$	$219\pm 0.2$	$0.3\pm 0.1$	$1.5\pm 0.1$
Superior target	$118.5\pm 0.8$	$‐0.6\pm 0.4$	$‐3.3\pm 0.4$	$108\pm 0.2$	$‐0.1\pm 0.1$	$‐0.5\pm 0.1$
Inferior target	$59.8\pm 0.5$	$‐2.8\pm 0.2$	$‐0.1\pm 0.2$	$53.7\pm 0.2$	$‐1.2\pm 0.1$	$‐1.2\pm 0.1$
Prostate
PTV	$182.6\pm 0.2$	$‐0.8\pm 0.1$	$‐0.2\pm 0.1$	$184.3\pm 0.3$	$‐0.6\pm 0.2$	$0.2\pm 0.2$
Rectum	$134.4\pm 0.5$	$‐1.6\pm 0.3$	$2.5\pm 0.3$	$144.0\pm 0.3$	$‐1.5\pm 0.2$	$1.7\pm 0.2$
Bladder	$138.8\pm 0.8$	$1.3\pm 0.4$	$‐1.2\pm 0.4$	$129.4\pm 0.8$	$‐2.8\pm 0.4$	$‐4.2\pm 0.4$
Head and neck
PTV	$207.1\pm 0.1$	$‐2.9\pm 0.0$	$‐3.5\pm 0.0$	$198.0\pm 0.3$	$‐4.2\pm 0.1$	$‐3.5\pm 0.1$
Spinal cord	$124.1\pm 1.4$	$‐1.4\pm 0.7$	$‐2.0\pm 0.7$	$127.4\pm 0.9$	$‐4.0\pm 0.4$	$‐2.8\pm 0.4$
C‐shape
Central core	$53.2\pm 0.3$	$‐0.9\pm 0.2$	$‐3.4\pm 0.2$	$44.0\pm 0.3$	$‐2.0\pm 0.1$	$‐4.0\pm 0.1$
Outer target	$212.0\pm 0.3$	$1.8\pm 0.1$	$5.5\pm 0.1$	$202.0\pm 0.7$	$‐2.8\pm 0.3$	$‐3.5\pm 0.3$
Average		$‐0.8\pm 0.5$	$‐0.6\pm 0.9$		$‐1.9\pm 0.5$	$‐1.6\pm 0.7$
|Average|		$1.5\pm 0.3$	$2.2\pm 0.6$		$2.0\pm 0.5$	$2.3\pm 0.5$