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Effect of increased axial field of view on the performance of a volume PET scanner

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4 Author(s)
Karp, J.S. ; Dept. of Radiol., Pennsylvania Univ., Philadelphia, PA, USA ; Kinahan, P.E. ; Muehllehner, G. ; Countryman, P.

The performance of the PENN-PET (positron emission tomography) 240H scanner from UGM Medical Systems is tested and compared to the prototype PENN-PET scanner built at the University of Pennsylvania. The UGM PENN-PET scanner consists of six continuous position-sensitive NaI(Tl) detectors, which results in a 50-cm transverse field-of-view and a 12.8-cm axial field-of-view. The fine spatial sampling in the axial direction allows the data to be sorted into as many as 64 transverse planes, each 2-mm thick. A large axial acceptance angle, without interplane septa, results in a high sensitivity, with a low scatter and random fraction, due to the use of a narrow photopeak energy window. Emphasis is placed on those performance measurements that illustrate the special characteristics of a volume imaging scanner and how they change as the axial length is increased.<>

Published in:

Nuclear Science Symposium and Medical Imaging Conference, 1991., Conference Record of the 1991 IEEE

Date of Conference:

2-9 Nov. 1991