Comparison of gamma index based on dosimetric error and clinically relevant dose–volume index based on three-dimensional dose prediction in breast intensity-modulated radiation therapy

Table 4 Summary of predicted per-organ 3D GPR derived from each TPS (XiO or RayStaion)

predicted per-organ 3D GPR	XiO	RayStation	P value
predicted per-organ 3D GPR	Mean ± SD (range)	Mean ± SD (range)	P value
PTV
3%/3 mm	94.9 ± 2.1	93.1 ± 2.4	p < 0.001
3%/3 mm	(89.2–98.2)	(88.2–96.8)	p < 0.001
3%/2 mm	93.9 ± 2.4	91.6 ± 2.8	p < 0.001
3%/2 mm	(88.0–97.8)	(86.4–96.2)	p < 0.001
2%/2 mm	91.9 ± 3.1	89.4 ± 5.2	Not Significant
2%/2 mm	(85.4–96.0)	(76.8–96.4)	Not Significant
Ipsilateral lung
3%/3 mm	73.3 ± 9.1	85.9 ± 5.0	p < 0.001
3%/3 mm	(53.1–86.2)	(75.4–93.3)	p < 0.001
3%/2 mm	67.7 ± 8.7	84.6 ± 5.4	p < 0.001
3%/2 mm	(47.6–78.5)	(73.0–93.1)	p < 0.001
2%/2 mm	63.1 ± 8.9	84.3 ± 5.3	p < 0.001
2%/2 mm	(43.9–79.3)	(73.3–93.0)	p < 0.001
Heart
3%/3 mm	97.6 ± 3.9	98.8 ± 3.5	p < 0.05
3%/3 mm	(84.1–100)	(83.8–100)	p < 0.05
3%/2 mm	95.4 ± 3.8	98.4 ± 3.5	p < 0.001
3%/2 mm	(84.6–99.9)	(83.8–100)	p < 0.001
2%/2 mm	92.6 ± 4.8	98.4 ± 3.4	p < 0.001
2%/2 mm	(82.7–99.0)	(83.8–100)	p < 0.001

ISSN: 1748-717X