Detector Blurring and Detector Sensitivity Compensation for a Spinning Slat Collimator

Author

Zeng, Gengsheng L.

Author_Institution

Utah Center for Adv. Imaging Res., Utah, Salt Lake City, UT

Volume

53

Issue

5

fYear

2006

Firstpage

2628

Lastpage

2634

Abstract

This paper extends the well-known frequency-distance relation to a rotating-spinning parallel-slat collimator SPECT system, where the projection data are in the form of weighted planar integrals and the detection sensitivity function is inversely proportional to the distance between the point source and the detector. The three-dimensional (3D) Radon inversion formula is used in image reconstruction. The 3D backprojection is implemented as Marr´s two-step two-dimensional (2D) backprojectors. The frequency-distance relation is applied in the second step of the 2D backprojection. Both the collimator blurring and distance dependent sensitivity effect are compensated for

Keywords

biomedical imaging; collimators; image reconstruction; particle detectors; single photon emission computed tomography; 3D Radon inversion formula; 3D backprojection; Marrs two-step 2D backprojectors; detector blurring; detector sensitivity compensation; frequency-distance relation; image reconstruction algorithm; point source; rotating-spinning parallel-slat collimator SPECT system; weighted planar integrals; Cameras; Collimators; Detectors; Frequency; Image reconstruction; Motion detection; Single photon emission computed tomography; Slabs; Spatial resolution; Spinning; Analytical image reconstruction algorithm; SPECT; frequency-distance relation;

fLanguage

English

Journal_Title

Nuclear Science, IEEE Transactions on

Publisher

ieee

ISSN

0018-9499

Type

jour

DOI

10.1109/TNS.2006.882574

Filename

1710248