NDLI: Transmission CT reconstruction for offset fan beam collimation

Content Provider	IEEE Xplore Digital Library
Author	Gilland, D.R. Jaszczak, R.J. Coleman, R.E.
Copyright Year	1963
Abstract	Offset fan beam collimation has shown to be an effective means of obtaining transmission CT (TCT) data for SPECT attenuation correction. This paper compared three methods for handling the truncation problem and reconstructing this TCT data: iterative Os-FM and filtered backprojection (FBP) with two different pre-processing approaches. The first approach (FBP1) extends the fan beam projection by sinogram interpolation, and the second (FBP2) uses parallel beam rebinning. With a TCT spatial resolution phantom, FBP2 demonstrated a small degree of resolution loss which was equalized across methods after post-reconstruction filtering. With a thorax phantom, all methods performed adequately at high count level; however, at low count level, FBPI showed degraded image quality due to its handling of zero count projection bins. This finding was corroborated in patient images. It is concluded that at practical count levels, the iterative OS-FM method offers a clear advantage in TCT image quality compared to FBP methods.
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	1602
Ending Page	1606
Page Count	5
File Size	710333
File Format	PDF
ISSN	00189499
Volume Number	47
Issue Number	4
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2000-08-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Collimators Computed tomography Image reconstruction Iterative methods Spatial resolution Imaging phantoms Image quality Attenuation Interpolation Filtering
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
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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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