In Situ Investigation of the 3D Mechanical Microstructure at Nanoscale: Nano-CT Imaging Method of Local Small Region in Large Scale Sample

Table 2

Criteria values for the local reconstruction of the Shepp-Logan head phantom.

Algorithm	𝑑	Relative change of 𝑑	𝑟	Relative change of 𝑟	𝑐	Relative change of 𝑐
FBP	1.8632	—	2.6380	—	0.7095	—
Method in [13]	1.7999	↑3.40%	2.5667	↑2.70%	0.8116	↑14.4%
Method in this paper	1.5042	↑19.27%	1.8156	↑31.18%	0.9796	↑38.07%