Prior Image Guided Undersampled Dual Energy Reconstruction with Piecewise Polynomial Function Constraint

Table 4

The quantitative estimations of the reconstruction results of the dental phantom.

Method	RMSE	Iteration number	Time (s)
PPFC	1.1×10^−3	20	238
PICCS	2.5×10^−3	200	288

The RMSE is compared to the noiseless results of FBP.