NDLI: Slab-by-slab blurring model for geometric point response correction and attenuation correction using iterative reconstruction algorithms

Content Provider	IEEE Xplore Digital Library
Author	Bai, C. Zeng, G.L. Gullberg, G.T. DiFilippo, F. Miller, S.
Copyright Year	1998
Description	Author affiliation: Dept. of Radiol., Utah Univ., Salt Lake City, UT, USA (Bai, C.)
Abstract	The distance-dependent geometric point response of a single photon emission computed tomographic (SPECT) system and the attenuation effect of photons passing through the object are modeled in an iterative OS-EM reconstruction algorithm to improve both the resolution and quantitative accuracy of the reconstructed images. In this paper, an efficient incremental slab-by-slab blurring model was introduced to speed up the reconstruction. A specified number of neighboring vertical slices are grouped into a slab. Slab-by-slab blurring, rather than slice-by-slice blurring, is performed to reduce the convolution times for both projector and backprojector which model the geometric point response of the system. The key advantage of this slab-by-slab blurring model over the slice-by-slice model is that the computational time can be significantly reduced while still maintaining the spatial resolution and quantitative accuracy of the reconstructed images. The application of this incremental slab-by-slab blurring model, incorporated with a model for attenuation, to the image reconstruction of patient SPECT data shows improved resolution and contrast over the images reconstructed without the corrections; it also shows much less computational time for the reconstruction than the slice-by-slice implementation.
Starting Page	1371
Ending Page	1375
File Size	463711
Page Count	5
File Format	PDF
ISBN	0780342585
ISSN	10823654
DOI	10.1109/NSSMIC.1997.670576
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	1997-11-09
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Solid modeling Image reconstruction Single photon emission computed tomography Attenuation Image resolution Spatial resolution Optical computing Reconstruction algorithms Slabs Convolution
Content Type	Text
Resource Type	Article

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1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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9	IDR Setup or Support	Queries related to establishment and support of Institutional Digital Repository (IDR) and IDR workshops	idr@ndl.gov.in

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