Table 3.

Statistics of the DVH metrics differences between the DCG -, FCN- and GAN-based sCT and CT

		PTV
		Dmin	D10	D50	D95	Dmean	Dmax
DCG	Mean (Gy)	0.160	0.081	0.088	0.081	0.083	0.161
	SD (Gy)	0.227	0.049	0.058	0.059	0.055	0.123
FCN	Mean (Gy)	0.158	0.138	0.125	0.130	0.131	0.260
	SD (Gy)	0.171	0.121	0.134	0.102	0.124	0.247
GAN	Mean (Gy)	0.062	0.197	0.171	0.160	0.177	0.336
	SD (Gy)	0.055	0.239	0.258	0.146	0.231	0.211
p-value (DCG vs FCN)		0.020	0.358	0.491	0.272	0.422	0.170
p-value (DCG vs GAN)		0.083	0.878	0.977	0.693	0.933	0.334
p-value (FCN vs GAN)		0.745	0.588	0.555	0.686	0.587	0.793
		Liver
		D min	D 10	D 50	D 95	D mean	D max
DCG	Mean (Gy)	0.002	0.063	0.027	0.005	0.030	0.141
	SD (Gy)	0.002	0.051	0.031	0.013	0.025	0.106
FCN	Mean (Gy)	0.001	0.073	0.027	0.003	0.023	0.257
	SD (Gy)	0.001	0.060	0.035	0.005	0.028	0.248
GAN	Mean (Gy)	0.002	0.094	0.047	0.005	0.037	0.284
	SD (Gy)	0.002	0.144	0.075	0.008	0.068	0.230
p-value (DCG vs FCN)		0.771	0.376	0.815	0.720	0.686	0.102
p-value (DCG vs GAN)		0.915	0.976	0.506	0.552	0.683	0.378
p-value (FCN vs GAN)		0.415	0.218	0.331	0.355	0.206	0.439

DCG, dense-cycle-GAN; FCN, fully convolutional neural network; GAN, generative adversarial network; PTV, planning target volume; SD, standard deviation.

Mean,SD and p-value are based on the absolute difference.