TABLE 4.

The registration results of the comparison experiments on the K2 model.

	K2
Indicators	Our	NMI	${\mathrm{MI}}_{grad}$	PnP	MS‐DSSIM	Depth‐GAN
mTRE (mm)	1.27 ± 0.42	16.24 ± 14.12	8.69 ± 3.59	81.14 ± 72.65	14.56 ± 6.43	14.43 ± 5.56
OE (°)	0.54 ± 0.19	5.35 ± 1.82	6.14 ± 2.34	46.82 ± 48.40	9.27 ± 3.70	8.20 ± 2.94
PE (mm)	0.42 ± 0.24	2.63 ± 0.74	3.93 ± 2.23	41.28 ± 50.92	4.58 ± 2.44	5.12 ± 1.92