Study on the transferability of the knowledge-based VMAT model to predict IMRT plans in prostate cancer radiotherapy

Table 2 Comparisons of the PTV and OAR doses between the manual plan and the two IMR automated plans (x¯ ± s)

	M-IMRT(M)	V-IMRT(V)	I-IMRT(I)	P value
	M-IMRT(M)	V-IMRT(V)	I-IMRT(I)	M&V	V&I	M&I
PTV
Dmax (Gy)	73.95 ± 1.04	73.22 ± 0.87	72.90 ± 0.59	0.54	0.65	0.89
V105% (cc)	0.12 ± 0.25	0.01 ± 0.01	0.00 ± 0.01	0.17	0.21	0.88
HI	1.05 ± 0.02	1.04 ± 0.01	1.04 ± 0.01	0.12	0.04	0.57
CI	0.87 ± 0.03	0.89 ± 0.01	0.86 ± 0.02	0.64	0.61	0.58
Rectum(Gy)
D15%	51.68 ± 2.69	52.98 ± 5.53	52.51 ± 5.31	0.25	0.51	0.65
D25%	41.85 ± 2.57	42.85 ± 6.19	41.92 ± 6.37	0.60	0.97	0.46
D35%	34.88 ± 2.12	34.84 ± 5.94	33.69 ± 7.10	0.99	0.65	0.48
D50%	25.63 ± 2.77	23.45 ± 5.67	23.92 ± 7.36	0.35	0.55	0.66
Bladder(Gy)
D15%	45.36 ± 13.85	38.84 ± 17.74	39.85 ± 17.55	0.20	0.28	0.06
D25%	37.27 ± 17.54	25.88 ± 18.45	26.54 ± 18.45	0.05	0.07	0.01
D35%	32.01 ± 16.33	17.69 ± 16.36	17.77 ± 16.36	0.01	0.01	0.88
D50%	25.94 ± 15.49	10.54 ± 12.42	10.36 ± 12.58	0.01	0.01	0.67
Left femoral head(Gy)
Dmax	40.24 ± 6.90	35.28 ± 7.48	35.13 ± 6.65	0.02	0.01	0.88
D40%	20.17 ± 8.28	15.99 ± 7.36	16.44 ± 7.53	0.01	0.01	0.04
D25%	24.22 ± 9.14	19.25 ± 8.37	19.59 ± 8.23	0.01	0.01	0.35
Right femoral head(Gy)
Dmax	37.92 ± 11.57	28.74 ± 11.57	31 ± 9.72	0.00	0.01	0.04
D40%	19.68 ± 8.72	12.67 ± 7.2	13.42 ± 6.87	0.00	0.01	0.24
D25%	24.11 ± 9.12	16.71 ± 8.13	17.6 ± 8.11	0.00	0.01	0.20

ISSN: 2047-783X