Title :
ITEM-QM solutions for EM problems in image reconstruction
Author :
Pauli, Johannes ; Anton, Gisela ; Uhlmann, Norman ; Karg, Timo ; Pauli, Eva-Maria ; Weidemann, Andreas ; Beulertz, Werner
Author_Institution :
Phys. Inst. Abt. IV, Friedrich Alexander Univ. Erlangen-Nurnberg, Erlangen, Germany
Abstract :
ITEM (imaginary time expectation maximization), a new algorithm for the solution of expectation maximization (EM) problems based on the QM (quantum mechanical) 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 cameras. The choice of the optimal ITEM hamiltonian is discussed and numerical results are presented for the Compton camera.
Keywords :
image reconstruction; optimisation; Compton camera; ITEM; expectation maximization; hamiltonian; image reconstruction; imaginary time; imaginary time expectation maximization; quantum mechanics; Cameras; Computed tomography; Image reconstruction; Licenses; Minimization methods; Positron emission tomography; Quantum mechanics; Reconstruction algorithms; Regulators; Stationary state;
Conference_Titel :
Nuclear Science Symposium Conference Record, 2001 IEEE
Print_ISBN :
0-7803-7324-3
DOI :
10.1109/NSSMIC.2001.1008682
