TABLE 3.

The registration results of the comparison experiments on the K1 model.

	K1
Indicators	Our	NMI	${\mathrm{MI}}_{grad}$	PnP	MS‐DSSIM	Depth‐GAN
mTRE (mm)	0.97 ± 0.59	8.48 ± 4.15	4.70 ± 1.57	52.18 ± 25.65	13.79 ± 6.96	11.82 ± 6.08
OE (°)	0.54 ± 0.19	5.35 ± 1.82	3.07 ± 1.09	37.96 ± 33.92	8.64 ± 4.16	6.86 ± 3.37
PE (mm)	0.42 ± 0.24	2.63 ± 0.74	2.11 ± 0.72	17.28 ± 12.07	3.95 ± 2.36	4.90 ± 2.33