Independent absorbed-dose calculation using the Monte Carlo algorithm in volumetric modulated arc therapy

Radiation Oncology

Table 3 Difference between the Pinnacle SC and Monaco XVMC calculations regarding the patient CT in percentage ([D_Pinnacle] − [D_Monaco])/[D_Pinnacle] × 100)

Prostate	PTV					Rectum		Bladder
Prostate	D _max	D ₉₅	D ₅₀	D _mean	D _min	D _max	D _mean	D _max	D _mean
1	0.30	−1.38	−0.64	−0.73	−4.98	−0.56	−4.59	−0.38	0.25
2	3.31	1.72	0.84	0.94	−2.76	1.37	−4.74	3.67	5.09
3	−0.33	−0.61	−0.37	−0.58	−9.09	−1.00	−4.85	0.92	1.04
4	2.79	1.36	1.41	1.17	1.07	1.82	−3.18	1.73	−5.73
5	0.67	−0.05	0.00	−0.12	−1.42	1.19	−4.59	0.67	1.18
Mean	1.35	0.21	0.25	0.14	−3.44	0.56	−4.39	1.32	0.37
H&N	PTV					Spinal cord		Brain stem
	D _max	D ₉₅	D ₅₀	D _mean	D _min	D _max	D _mean	D _max	D _mean
1	1.15	−2.99	−0.78	−1.28	−6.26	−6.31	−11.70	−3.56	−21.24
2	−0.30	−1.20	−1.94	−1.99	−7.27	0.22	−22.80	0.02	1.79
3	1.60	1.69	2.03	1.83	−1.94	−3.67	−5.77	−1.62	−21.19
Mean	0.82	−0.83	−0.23	−0.48	−5.16	−3.25	−13.42	−1.72	−13.55
Esophagus	PTV					Spinal cord		Lung
	D _max	D ₉₅	D ₅₀	D _mean	D _min	D _max	D _mean	D _mean
1	1.07	−0.90	−0.88	−0.85	−1.95	−5.68	−4.74	−2.03
Rectum	PTV					Small bowel		Bladder
Rectum	D _max	D ₉₅	D ₅₀	D _mean	D _min	D _max	D _mean	D _max	D _mean
1	1.76	−0.55	−0.78	−0.78	−0.17	0.62	−2.86	−0.17	−2.54
Lung	PTV					PTV-lung		Contralateral lung
	D _max	D ₉₅	D ₅₀	D _mean	D _min	D _mean		D _mean
1	1.30	−0.10	0.57	0.57	−5.50	−0.29		−4.79
2	1.21	−0.20	−0.19	−0.12	−1.57	1.85		0.60
3	−1.34	−0.45	−0.24	−0.34	−0.67	−1.48		5.72
4	−1.79	−0.03	−0.45	−0.37	0.19	−1.68		−2.14
5	1.18	−0.70	−0.63	−0.46	−0.74	1.45		0.49
Mean	0.11	−0.30	−0.19	−0.14	−1.66	−0.03		−0.03

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