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          Institute: MPI für neurologische Forschung     Collection: Emeritus-Collection Prof. Heiss     Display Documents



ID: 13149.0, MPI für neurologische Forschung / Emeritus-Collection Prof. Heiss
The ECAT HRRT: NEMA NEC evaluation of the HRRT system, the new high-resolution research tomograph
Authors:Eriksson, L.; Wienhard, Klaus; Eriksson, M.; Casey, M. E.; Knoess, Christof; Bruckbauer, Thomas; Hamill, J.; Schmand, Matthias; Gremillion, T.; Lenox, M.; Conti, M.; Bendriem, B.; Heiss, Wolf-Dieter; Nutt, R.
Language:English
Date of Publication (YYYY-MM-DD):2002-10
Title of Journal:IEEE Transactions on Nuclear Science
Journal Abbrev.:IEEE Trans. Nucl. Sci.
Volume:49
Issue / Number:5
Start Page:2085
End Page:2088
Copyright:Copyright 2002 by The Institute of Electrical and Electronics Engineers, Inc.
Review Status:Peer-review
Audience:Experts Only
Abstract / Description:The ECAT HRRT (high-resolution research tomograph) is a three- dimensional (3-D)-only dedicated brain positron emission tomograph (PET) with LSO and GSO scintillators. The system is based on eight panels of detectors. The HRRT's imaging performance has previously been tested with phantoms and FDG scans performed in animal and human brains that showed significantly improved spatial resolution, below 2.5 mm for animal studies and below 3 mm for brain studies. The NEC count rate performance has been evaluated based on the NU 2-2001 protocol. The results show a peak NEC approximately 30% higher than the performance of the Ecat HR+, this in spite of a more shallow detector for the HRRT, only 15 mm relative to the 30 mm for the HR+. However, peak NEC as derived from the 70-cm line source phantom is not optimized for the performance of dedicated brain scanner. NEC data derived with a 20-cm diameter, 20-cm long phantoms show a peak NEC more than 60% higher than for the HR+. The reasons for the high performance are due to several factors, the large axial coverage, the short timing window of 6 ns, and the low detector dead time, all factors that imply the use of fast LSO and GSO scintillators.
Free Keywords:LSO and GSO scintillators; Monte Carlo simulations; NEC count rate measurements; panel detectors; positron emission tomography
Comment of the Author/Creator:Date: 2002, OCT
External Publication Status:published
Document Type:Article
Communicated by:N. N.
Affiliations:MPI für neurologische Forschung/Allgemeine Neurologie (PET) - Abt. Prof. Heiss
External Affiliations:CTI PET Syst Inc, Knoxville, TN 37932 USA; CTI PET Syst Inc, Knoxville, TN 37932 USA; Karolinska Inst, SE-17176 Stockholm, Sweden; Max Planck Inst Neurol Res, Cologne, Germany
Identifiers:ISI:000179177300009 [ID No:1]
ISSN:0018-9499 [ID No:2]
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