Table 2. RMSEs of decomposition results based on the reconstructed images from different methods.

Algorithm	Tissue	Bone	Iodine	Average
FBP	2.7610	0.3016	0.4759	1.6269
TV	0.1743	0.0218	0.0300	0.1029
LRTA	0.2023	0.0245	0.0280	0.1188
Proposed	0.0556	0.0079	0.0125	0.0332

These italic values denote the results of the proposed method.