Title :
Image reconstruction algorithm for a SPECT system with a convergent rotating slat collimator
Author :
Zeng, Gengsheng L. ; Gagnon, Daniel
Author_Institution :
Med. Imaging Res. Lab., Univ. of Utah, Salt Lake City, UT, USA
Abstract :
In this paper, we suggest the use of a convergent rotating slat collimator in a SPECT system that contains strip-shaped CdZnTe detectors. This CdZnTe imaging device is able to provide better energy resolution than a conventional NaI(Tl) detector. A convergent imaging geometry has a higher detection sensitivity than a parallel imaging geometry when imaging a small object. A novel design method and reconstruction technique are proposed for use in this system.
Keywords :
collimators; geometry; image reconstruction; single photon emission computed tomography; CdZnTe imaging device; SPECT system; convergent imaging geometry; convergent rotating slat collimator; detection sensitivity; energy resolution; filtered backprojection; image reconstruction algorithm; parallel imaging geometry; single photon emission computed tomography; strip-shaped CdZnTe detectors; Attenuation; Cameras; Collimators; Detectors; Energy resolution; High-resolution imaging; Image converters; Image reconstruction; Object detection; Scattering;
Journal_Title :
Nuclear Science, IEEE Transactions on
DOI :
10.1109/TNS.2003.823042
