Spatial properties of the scatter response function in SPECT
Frey, E.C.
Tsui, B.M.W.
Dept. of Radiol. & Curriculum in Biomed. Eng., North Carolina Univ., Chapel Hill, NC;
This paper appears in: Nuclear Science, IEEE Transactions on
Publication Date: Apr 1991
Volume: 38,
Issue: 2, Part 1-2
On page(s): 789-794
Meeting Date: 10/22/1990 - 10/27/1990
Location: Arlington, VA, USA
ISSN: 0018-9499
References Cited: 17
CODEN: IETNAE
INSPEC Accession Number: 3971063
Digital Object Identifier: 10.1109/23.289392
Current Version Published: 2002-08-06
Abstract
It was previously shown by the authors (ibid., vol.37, no.3,
p.1308-15, 1990) that the scatter response function (SRF) in single
photon emission computed tomography (SPECT) imaging can be fit using a
fitting function consisting of the sum of a Gaussian and two
half-Gaussians with different widths. In the present work, the fitting
parameters are studied as a function of source position in a cylindrical
water-filled phantom for a low-resolution (LR), high-sensitivity
collimator. It is found that each fitting parameter can be described in
terms of a single geometric parameter. The useful parameters include the
source depth and the distance to the edge of the phantom. However, for a
low-energy general-purpose collimator, it may be more useful to
parameterize the SRF as the product or other function of the SRF for a
semiinfinite slab, and an aperture function which depends on the shape
of the surface of the phantom. This parameterization of the SRF is
useful for scatter compensation in SPECT
Index
Terms
Available to subscribers and IEEE members.
References
Available to subscribers and IEEE members.
Citing Documents
Available to subscribers and IEEE members.
Cart
