Title :
The design and implementation of COSEN, an iterative algorithm for fully 3-D listmode data
Author :
Levkovilz, R. ; Falikman, Dmitry ; Zibulevsky, Michael ; Ben-Tal, Aharon ; Nemirovski, Arkadi
Author_Institution :
Minerva Opt. Center, Technion-Israel Inst. of Technol., Haifa, Israel
fDate :
7/1/2001 12:00:00 AM
Abstract :
Presents coincidence-list-ordered set expectation-maximisation (COSEM), an algorithm for iterative image reconstruction directly from list-mode coincidence acquisition data. The COSEM algorithm is based on the ordered sets EM algorithm for binned data but has several extensions that makes it suitable for rotating two planar detector tomographs. The authors develop the COSEM algorithm and extend it to include analytic calculation of detection probability, noise reducing iterative filtering schemes, and on-the-fly attenuation correction methods. The authors present an adaptation of COSEM to the VaricamVG camera and show results from clinical and phantom studies.
Keywords :
image reconstruction; iterative methods; medical image processing; positron emission tomography; 3-D reconstruction; COSEN; PET; VaricamVG camera; binned data; clinical studies; coincidence-list-ordered set expectation-maximisation; detection probability; fully 3-D listmode data; iterative algorithm; list-mode coincidence acquisition data; medical diagnostic imaging; noise reducing iterative filtering schemes; nuclear medicine; on-the-fly attenuation correction methods; phantom studies; planar detector tomographs rotation; Algorithm design and analysis; Attenuation; Cameras; Detectors; Filtering algorithms; Image reconstruction; Iterative algorithms; Iterative methods; Noise reduction; Probability; Algorithms; Humans; Image Processing, Computer-Assisted; Imaging, Three-Dimensional; Mathematics; Models, Theoretical; Phantoms, Imaging; Tomography; Tomography, Emission-Computed;
Journal_Title :
Medical Imaging, IEEE Transactions on
