A projector, backprojector pair which accounts for the two-dimensional depth and distance dependent blurring in SPECT

The speed and accuracy of iterative reconstruction routines for single-photon-emission computed tomography (SPECT) are highly dependent on the projection and backprojection algorithms used. A projector-backprojector pair which accounts for the two-dimensional, spatially dependent blurring encountere...

Full description

Saved in:
Bibliographic Details
Published in:IEEE transactions on nuclear science 1990-04, Vol.37 (2), p.681-686
Main Authors: Penney, B.C., King, M.A., Knesaurek, K.
Format: Article
Language:English
Subjects:
Attenuation
Biomedical imaging
Collimators
Electromagnetic scattering
Image reconstruction
Iterative algorithms
Nuclear medicine
Particle scattering
Single photon emission computed tomography
Solid modeling
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:The speed and accuracy of iterative reconstruction routines for single-photon-emission computed tomography (SPECT) are highly dependent on the projection and backprojection algorithms used. A projector-backprojector pair which accounts for the two-dimensional, spatially dependent blurring encountered in SPECT and which reduces the computational load has been developed. These algorithms assume that the attenuator is a uniform elliptical cylinder that is invariant in the axial direction. They further assume that the blur can be modeled using the sum of several separable functions, e.g. separate Gaussian functions for the geometric and scatter components. When implemented on an array processor of moderate computational power, a projection or backprojection of a SPECT study, with 64 64-pixel*64-pixel projection images and a 64*64*64 reconstruction space, can be completed in less than 2.4 h, or 2.3 min per transverse slice.< >
ISSN:0018-9499
1558-1578
DOI:10.1109/23.106698