NDLI: Reduction of truncation artifacts in fan beam transmission by using parallel beam emission data

Content Provider	IEEE Xplore Digital Library
Author	Tin-Su Pan King, M.A. Penney, B.C. Rajeevan, N. Der-Shan Luo Case, J.A.
Copyright Year	1994
Description	Author affiliation: Dept. of Nucl. Med., Massachusetts Univ. Med. Center, Worcester, MA, USA (Tin-Su Pan; King, M.A.)
Abstract	We describe a method to reduce the truncation artifacts in the fan beam transmission image reconstruction of a simultaneous transmission and emission SPECT system. Parallel hole collimation is adopted for the measurement of both emission photopeak and Compton scatter photons, which are also used to obtain the body and lung outlines. The lung outlines can be refined using attenuation coefficient (/spl mu/) estimates from within the fully sampled region (FSR) of the attenuation map computed using the truncated transmission data. The regions of the lungs and other soft tissues are assigned appropriate attenuation coefficients to create the attenuation map with no truncation, which are then reprojected to augment the transmission projection data. A match of the total attenuation between the real and reprojected data is made at each projection angle in each slice to account for the different attenuation coefficients in different slices. Finally, a reconstruction of the combined measured and augmented data is performed. We demonstrate that this method can significantly reduce the truncation artifacts using two phantom studies. When some portion of the heart falls outside the FSR, the attenuation map estimated from this method can more effectively correct for the attenuation in the emission data than the truncated map.
Starting Page	1563
Ending Page	1567
File Size	649115
Page Count	5
File Format	PDF
ISBN	0780325443
DOI	10.1109/NSSMIC.1994.474764
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	1994-10-30
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Attenuation Lungs Image reconstruction Optical collimators Electromagnetic scattering Particle scattering Single photon emission computed tomography Biological tissues Performance evaluation Imaging phantoms
Content Type	Text
Resource Type	Article

Sl.	Authority	Responsibilities	Communication Details
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
6	Contents and Copyright Issues	Queries related to content curation and copyright issues	content@ndl.gov.in
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