ITEM (imaginary time expectation maximization) [1], [2] a new algorithm for the solution of expectation maximization (EM) problems based on the (Quantum Mechanical) QM energy minimization via imaginary time (IT) evolution is presented. Due to its generality ITEM is applicable to various image reconstruction problems like CT, PET, SPECT and Compton camera. The choice of the optimal ITEM hamiltonian is discussed and numerical results are presented for the Compton camera.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.