[An improved ISRA algorithm for ECT].
Image space reconstruction algorithm (ISRA) is a new kind of method for ECT reconstruction. Unlike the ML-EM algorithm which maximizes likelihood function of Possion distribution, ISRA searches for the minimum non-negative mean square solution. In this paper, an improved ISRA (IISRA) algorithm is proposed. A comparison between the algorithms (ISRA and IISRA) demonstrates that the result of IISRA is closer to the test image than that of ISRA. In addition, the IIRSA inherits some properties of ISRA such as convergence.
Yu
Z
Z
State Key Lab. of CAD & CG, Zhejiang University, Hangzhou.
Tao
B
B
D000465:Algorithms; D007091:Image Processing, Computer-Assisted; D014055:Tomography, Emission-Computed / Q000295:instrumentation