Table 2.

Comparison of registration accuracy (mm).

Method	TRE ($\text{mean}\pm \mathrm{SD}$)	ACD ($\text{mean}\pm \mathrm{SD}$)	ACDIP ($\text{mean}\pm \mathrm{SD}$)
Proposed NFS	$1.87\pm 0.87$	$1.28\pm 0.78$	$1.25\pm 0.76$
Conventional NFS	$5.32\pm 2.25$	$4.71\pm 2.61$	$4.66\pm 2.57$
Rigid registration	$8.24\pm 3.23$	$6.63\pm 3.15$	$6.59\pm 3.14$