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Description of a prototype emission-transmission computed tomography imaging systemWe have developed a prototype imaging system that can perform simultaneous x-ray transmission CT and SPECT phantom studies. This system employs a 23-element high-purity-germanium detector array. The detector array is coupled to a collimator with septa angled toward the focal spot of an x-ray tube. During image acquisition, the x-ray fan beam and the detector array move synchronously along an arc pivoted at the x-ray source. Multiple projections are obtained by rotating the object, which is mounted at the center of rotation of the system. The detector array and electronics can count up to 10(6) cps/element with sufficient energy-resolution to discriminate between x-rays at 100-120 kVp and gamma rays from 99mTc. We have used this device to acquire x-ray CT and SPECT images of a three-dimensional Hoffman brain phantom. The emission and transmission images may be superimposed in order to localize the emission image on the transmission map.
Document ID
20050000601
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Lang, T. F.
(University of California San Francisco)
Hasegawa, B. H.
Liew, S. C.
Brown, J. K.
Blankespoor, S. C.
Reilly, S. M.
Gingold, E. L.
Cann, C. E.
Date Acquired
August 22, 2013
Publication Date
October 1, 1992
Publication Information
Publication: Journal of nuclear medicine : official publication, Society of Nuclear Medicine
Volume: 33
Issue: 10
ISSN: 0161-5505
Subject Category
Life Sciences (General)
Funding Number(s)
CONTRACT_GRANT: T6 6M08155
CONTRACT_GRANT: 1 R01CA50539
CONTRACT_GRANT: 1P01DK39964
Distribution Limits
Public
Copyright
Other
Keywords
NASA Discipline Musculoskeletal
Non-NASA Center

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