Title :
A continuation method for emission tomography
Author :
Lee, Mindy ; Rangarajan, Anand ; Zubal, I. George ; Gindi, Gene
Author_Institution :
Yale Univ., New Haven, CT, USA
fDate :
12/1/1993 12:00:00 AM
Abstract :
The authors describe a continuation method in which the minimum of the energy function corresponding to one member of the Φ function sequence is used as an initial condition for the minimization of the next, less approximate, stage. This continuation method is implemented using a GEM-ICM (generalized expectation maximization-iterated conditioned mode) procedure. Simulation results show improvement using this continuation method relative to using Φ* alone, and to conventional EM reconstructions
Keywords :
Bayes methods; computerised tomography; image reconstruction; medical image processing; radioisotope scanning and imaging; Phi function sequence; continuation method; emission tomography; energy function; generalized expectation maximization-iterated conditioned mode; Annealing; Computed tomography; Computer science; Image reconstruction; Maximum likelihood estimation; Minimization methods; Nuclear and plasma sciences; Radiology; Reconstruction algorithms; Temperature;
Journal_Title :
Nuclear Science, IEEE Transactions on
