Title :
Noise propagation in electronically collimated single photon imaging
Author :
Singh, Manbir ; Leahy, Richard ; Brechner, Ricardo ; Hebert, Tom
Author_Institution :
Univ. of Southern California, Los Angeles, CA, USA
fDate :
2/1/1988 12:00:00 AM
Abstract :
Cone-beam views of an object are produced from counts acquired with an electronically collimated system for SPECT (single-photon-emission computed tomography) using a deconvolution procedure. The propagation of noise through this procedure has been investigated using four approaches: a theoretical analysis using an approximate description of the point spread function in the form of an annulus; inverse filtering of a simulated disk source containing hot and cold regions; application of ART (algebraic reconstruction technique) using an accurate point spread function; and experimental reconstruction of a Cs-137 disk source.
Keywords :
computerised tomography; radioisotope scanning and imaging; 137Cs; SPECT; algebraic reconstruction technique; cone beam views; deconvolution procedure; electronically collimated single photon imaging; inverse filtering; noise; point spread function; propagation; simulated disk source; Computer simulation; Electromagnetic scattering; Filtering; Image reconstruction; Optical collimators; Particle scattering; Performance analysis; Signal resolution; Single photon emission computed tomography; Subspace constraints;
Journal_Title :
Nuclear Science, IEEE Transactions on
