NDLI: Quantifying the effects of defective block detectors in a 3D whole body pet camera

Content Provider	IEEE Xplore Digital Library
Author	Samiee, M. Goertzen, A.L.
Copyright Year	2007
Description	Author affiliation: Univ. of Manitoba, Winnipeg (Samiee, M.; Goertzen, A.L.)
Abstract	A comparison study was conducted in order to assess the image quality of a clinical 3D whole body PET scanner (Siemens Biograph 16 HiRez) in the condition of failure of one or more block detectors. A data set was acquired using the NEMA image quality phantom when all detectors were functioning normally. The ratio of the activity in the four smallest spheres to the background region was 8.27:1. Defective blocks were then simulated by zeroing the appropriate lines of response in the sinograms. Eight different combinations of defects are considered ranging from the case of no defect up to a complete bucket failure (12 blocks). Images were reconstructed with both OSEM and FBP using the manufacturer's software. The images were examined both qualitatively and according to the NEMA NU 2-2001 protocol for contrast, variability, and residual error. The results show that despite very visible artefacts appearing in the images the NEMA contrast analysis was very similar for all defect cases. The variability increased for all cases with simulated defective blocks. The contrast results demonstrate that a method of qualitatively evaluating the images is required in addition to the quantitative analysis. The preliminary data examined in this study suggest that data acquired when there are two defective blocks in the system might still produce clinically useable images.
Starting Page	4258
Ending Page	4261
File Size	691628
Page Count	4
File Format	PDF
ISBN	9781424409228
ISSN	10957863
DOI	10.1109/NSSMIC.2007.4437057
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2007-10-26
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Detectors Whole-body PET Cameras Imaging phantoms Image quality Positron emission tomography Image reconstruction Manufacturing Image analysis Computed tomography defective block detector positron emission tomography NEMA image quality phantom sinogram
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

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