NDLI: Comparison of 180/spl deg/ and 360/spl deg/ iterative reconstruction with non-uniform attenuation compensation for Tl-201 SPECT

Content Provider	IEEE Xplore Digital Library
Author	LaCroix, K.J. Tsui, B.M.W. Hasegawa, B.H.
Copyright Year	1963
Abstract	This study compares Tl-201 SPECT images reconstructed from 180/spl deg/ and 360/spl deg/ projection data, using iterative reconstruction with non-uniform attenuation compensation. Using a mathematical phantom of the human thorax, Monte Carlo simulation is used to produce both 180/spl deg/ (45/spl deg/ RAO to 45/spl deg/ LPO) and 360/spl deg/ Tl-201 SPECT projection data. Included in the simulation are the effects of non-uniform attenuation, detector response, scatter and statistical noise. The 180/spl deg/ and 360/spl deg/ data were taken over 64 and 128 angles, respectively, assuming the same total acquisition time for both. The simulated projection data were reconstructed with nonuniform attenuation compensation using the ML-EM algorithm for 50 iterations and, for comparison, were also reconstructed without attenuation compensation using the filtered backprojection method with a ramp filter. Transaxial slices of the reconstructed images, image profiles and Bull's-eye plots all show that images reconstructed with attenuation compensation, unlike those reconstructed without attenuation compensation, are essentially the same within the region of the myocardium for the 180/spl deg/ and 360/spl deg/ data, with few artifacts and similar image contrast. Furthermore, for the same total imaging time, the images reconstructed from the 180/spl deg/ data have slightly less noise in the myocardial region.<>
Sponsorship	IEEE Nuclear and Plasma Sciences Society Computer Applications in Nuclear and Plasma Sciences (CANPS) Lawrence Berkeley Lab. Lawrence Livermore Nat. Lab. APS College of William and Mary Continuous Electron Beam Accelerator Facility NASA Defence Nuclear Agency Sandia National Laboratories Jet Propulsion Laboratory Brookhaven Nat. Lab. Lawrence Livermore Nat. Lab IEEE/NPPS Radiat. Effects Committee Defence Nuclear Agency/DoD Sandia National Laboratories/DOE Jet Propulsion Laboratory/NASA Phillips Lab./DoD
Starting Page	1276
Ending Page	1281
Page Count	6
File Size	633924
File Format	PDF
ISSN	00189499
Volume Number	42
Issue Number	4
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	1995-08-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Attenuation Image reconstruction Imaging phantoms Myocardium Biomedical engineering Radiology Thorax Heart Public healthcare Humans
Content Type	Text
Resource Type	Article
Subject	Nuclear and High Energy Physics Electrical and Electronic Engineering Nuclear Energy and Engineering

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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
5	Website/Portal (Helpdesk)	Queries regarding NDLI and its services	support@ndl.gov.in
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7	National Digital Library of India Club (NDLI Club)	Queries related to NDLI Club formation, support, user awareness program, seminar/symposium, collaboration, social media, promotion, and outreach	clubsupport@ndl.gov.in
8	Digital Preservation Centre (DPC)	Assistance with digitizing and archiving copyright-free printed books	dpc@ndl.gov.in
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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