An Algorithm of -Norm and -Norm Regularization Algorithm for CT Image Reconstruction from Limited Projection

Table 1

Comparison of two algorithms after same number of iterations.

(a)

Shepp-Logan phantom, after 200 iterations
	Time(s)	Error	RMSE	NRMSD	NMAD	SSIM
regularization	53	0.341	0.083	0.086	0.422	0.356
regularization	52	0.035	0.009	0.009	0.033	0.949

(b)

Cardiac image, after 500 iterations
	Time(s)	Error	RMSE	NRMSD	NMAD	SSIM
regularization	88	0.362	0.111	0.076	0.352	0.442
regularization	83	0.119	0.014	0.010	0.041	0.936