NDLI: Image quality assessment of LaBr/sub 3/ based 3D PET scanners

Content Provider	IEEE Xplore Digital Library
Author	Surti, S. Karp, J.S. Muehllehner, G.
Copyright Year	2004
Description	Author affiliation: Dept. of Radiol., Pennsylvania Univ., Philadelphia, PA, USA (Surti, S.)
Abstract	The main thrust for this work is the investigation and design of a PET scanner based on new lanthanum bromide scintillators. We use Monte Carlo simulations to generate data for a 3D PET scanner based on LaBr/sub 3/ detectors, and to assess the count-rate capability and the reconstructed image quality of phantoms with hot and cold spheres using contrast and signal-to- noise ratios. Previously we have shown that LaBr/sub 3/ has very high light output, excellent energy resolution, and fast timing properties which can lead to the design a time-of-flight whole-body PET camera. The data presented here illustrate the performance of LaBr, without the additional benefit of TOF information, although our intention is to develop a LaBr/sub 3/ scanner with TOF measurement capability. The only drawback of LaBr/sub 3/ is the lower photo-fraction that can potentially lead to a poorer spatial resolution than a high Z scintillator such as GSO or LSO. However, in 3D PET imaging where energy resolution is very important for reducing scattered coincidences in the reconstructed image, the image quality of a LaBr/sub 3/ scanner can potentially surpass other scanners. Our results show, that there is a gain in NEC (factors of 3 and 1.5 over GSO and LSO) arising from the reduced scatter and randoms fractions in a LaBr/sub 3/ scanner. The reconstructed image resolution is slightly worse than a high Z scintillator, but at increased count-rate, reduced pulse pileup leads to an image resolution similar to that of LSO. Image quality simulations predict reduced contrast for small hot spheres over an LSO scanner, but improved noise characteristics especially in a large 35/spl times/70cm phantom.
Starting Page	3041
Ending Page	3047
File Size	1065111
Page Count	7
File Format	PDF
ISBN	0780382579
ISSN	10823654
DOI	10.1109/NSSMIC.2003.1352540
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2003-10-19
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Image quality Positron emission tomography Image reconstruction Imaging phantoms Energy resolution Light scattering Image resolution Lanthanum Signal generators Detectors
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
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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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