Monitoring of mechanical errors and their dosimetric impact throughout the course of non-coplanar continuous volumetric-modulated arc therapy

Hirashima, Hideaki; Nakamura, Mitsuhiro; Miyabe, Yuki; Uto, Megumi; Nakamura, Kiyonao; Mizowaki, Takashi

doi:10.1186/s13014-018-0972-7

Table 4 Summary of dosimetric errors in the CTV and OARs for prostate cancer throughout the course of VMDWAT. Values are shown as means ± two standard deviations for the signed difference and those for the absolute difference in parentheses

From: Monitoring of mechanical errors and their dosimetric impact throughout the course of non-coplanar continuous volumetric-modulated arc therapy

Patient	CTV			Rectal wall		Bladder wall
Patient	D_99% (%)	D_mean (%)	D_1% (%)	V_70Gy (%)	D_mean (%)	V_70Gy (%)	D_mean (%)
3	0.1 ± 0.2 [0.1 ± 0.2]	0.2 ± 0.3 [0.2 ± 0.3]	0.2 ± 0.5 [0.3 ± 0.5]	− 0.3 ± 0.3 [0.3 ± 0.3]	0.0 ± 0.1 [0.0 ± 0.1]	0.2 ± 0.1 [0.1 ± 0.1]	0.0 ± 0.2 [0.1 ± 0.1]
4	0.1 ± 0.4 [0.2 ± 0.3]	0.0 ± 0.3 [0.1 ± 0.2]	0.0 ± 0.4 [0.2 ± 0.2]	0.1 ± 0.8 [0.3 ± 0.5]	−0.1 ± 0.1 [0.1 ± 0.1]	0.0 ± 0.0 [0.0 ± 0.0]	0.0 ± 0.1 [0.1 ± 0.1]
5	−0.2 ± 0.1 [0.2 ± 0.2]	−0.1 ± 0.1 [0.1 ± 0.1]	0.0 ± 0.2 [0.1 ± 0.1]	0.0 ± 0.1 [0.0 ± 0.1]	−0.3 ± 0.2 [0.3 ± 0.2]	0.1 ± 0.1 [0.1 ± 0.1]	0.1 ± 0.1 [0.1 ± 0.1]
6	−0.2 ± 0.1 [0.2 ± 0.2]	−0.1 ± 0.2 [0.1 ± 0.1]	− 0.1 ± 0.3 [0.2 ± 0.2]	−0.3 ± 0.2 [0.3 ± 0.3]	0.0 ± 0.1 [0.1 ± 0.1]	0.0 ± 0.1 [0.0 ± 0.1]	0.0 ± 0.1 [0.1 ± 0.1]
7	0.1 ± 0.4 [0.2 ± 0.3]	0.0 ± 0.2 [0.1 ± 0.2]	0.0 ± 0.3 [0.1 ± 0.2]	0.0 ± 0.0 [0.0 ± 0.0]	0.1 ± 0.2 [0.1 ± 0.1]	0.0 ± 0.1 [0.0 ± 0.1]	0.0 ± 0.1 [0.0 ± 0.1]
8	0.0 ± 0.2 [0.1 ± 0.1]	−0.1 ± 0.2 [0.1 ± 0.1]	−0.1 ± 0.3 [0.2 ± 0.1]	− 0.2 ± 0.2 [0.2 ± 0.2]	−0.1 ± 0.1 [0.1 ± 0.1]	0.0 ± 0.0 [0.0 ± 0.0]	0.0 ± 0.1 [0.0 ± 0.0]
9	−0.1 ± 0.4 [0.2 ± 0.3]	−0.1 ± 0.3 [0.1 ± 0.2]	0.0 ± 0.4 [0.2 ± 0.2]	0.0 ± 0.0 [0.0 ± 0.0]	0.0 ± 0.3 [0.1 ± 0.1]	−0.2 ± 0.1 [0.2 ± 0.2]	−0.2 ± 0.1 [0.2 ± 0.1]
10	0.1 ± 0.2 [0.1 ± 0.2]	0.0 ± 0.1 [0.1 ± 0.1]	0.0 ± 0.1 [0.1 ± 0.1]	0.3 ± 0.2 [0.3 ± 0.2]	0.1 ± 0.2 [0.2 ± 0.1]	0.0 ± 0.0 [0.0 ± 0.0]	0.0 ± 0.1 [0.0 ± 0.1]
11	−0.1 ± 0.2 [0.1 ± 0.1]	−0.1 ± 0.2 [0.1 ± 0.1]	0.0 ± 0.2 [0.1 ± 0.1]	0.1 ± 0.3 [0.1 ± 0.2]	0.0 ± 0.1 [0.0 ± 0.1]	0.1 ± 0.1 [0.0 ± 0.1]	0.0 ± 0.1 [0.0 ± 0.1]
12	−0.1 ± 0.1 [0.1 ± 0.1]	−0.1 ± 0.2 [0.1 ± 0.1]	− 0.1 ± 0.2 [0.1 ± 0.1]	−0.1 ± 0.1 [0.1 ± 0.1]	− 0.3 ± 0.1 [0.3 ± 0.1]	0.0 ± 0.1 [0.0 ± 0.1]	0.1 ± 0.2 [0.1 ± 0.2]
13	−0.1 ± 0.3 [0.1 ± 0.1]	0.0 ± 0.3 [0.1 ± 0.2]	0.1 ± 0.4 [0.2 ± 0.3]	0.2 ± 0.1 [0.2 ± 0.1]	0.0 ± 0.2 [0.1 ± 0.1]	0.0 ± 0.1 [0.0 ± 0.1]	0.1 ± 0.1 [0.1 ± 0.1]
14	0.2 ± 0.3 [0.2 ± 0.3]	0.0 ± 0.3 [0.1 ± 0.2]	−0.1 ± 0.3 [0.1 ± 0.2]	0.2 ± 0.3 [0.2 ± 0.3]	0.0 ± 0.2 [0.1 ± 0.1]	0.0 ± 0.1 [0.0 ± 0.1]	0.0 ± 0.1 [0.1 ± 0.1]
15	0.1 ± 0.2 [0.1 ± 0.2]	0.2 ± 0.2 [0.2 ± 0.2]	0.2 ± 0.2 [0.2 ± 0.2]	0.2 ± 0.2 [0.2 ± 0.2]	−0.1 ± 0.1 [0.1 ± 0.1]	0.0 ± 0.0 [0.0 ± 0.0]	0.0 ± 0.1 [0.0 ± 0.1]

Abbreviations: CTV clinical target volume, OARs organs at risk, VMDWAT volumetric-modulated Dynamic WaveArc therapy, D_mean mean dose, D_xx% dose covering xx% volume, V_{yy Gy} volume receiving yy Gy

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