Author/Authors :
Ikeda، نويسنده , , S. and Odaka، نويسنده , , H. and Uemura، نويسنده , , M. and Takahashi، نويسنده , , T. and Watanabe، نويسنده , , S. and Takeda، نويسنده , , S.، نويسنده ,
Abstract :
We study the image reconstruction problem of a Compton camera which consists of semiconductor detectors. The image reconstruction is formulated as a statistical estimation problem. We employ a bin-mode estimation (BME) and extend an existing framework to a Compton camera with multiple scatterers and absorbers. Two estimation algorithms are proposed: an accelerated EM algorithm for the maximum likelihood estimation (MLE) and a modified EM algorithm for the maximum a posteriori (MAP) estimation. Numerical simulations demonstrate the potential of the proposed methods.
Keywords :
Compton camera , Image reconstruction , Maximum a posteriori estimation , expectation maximization , Maximum likelihood estimation
