NDLI: Increased sensitivity through use of overlapping 180/spl deg/ orbits in clinical myocardial perfusion imaging

Content Provider	IEEE Xplore Digital Library
Author	Wallis, J.W.
Copyright Year	1994
Description	Author affiliation: Washington Univ. Sch. of Med., St. Louis, MO, USA (Wallis, J.W.)
Abstract	Clinical cardiac imaging is hindered by noise due to limited activity and imaging time. Use of 90/spl deg/ dual detector systems with 90/spl deg/ gantry rotation may provide the best sensitivity/resolution for cardiac imaging, but this option is not available to those using a triple-detector system with detectors at 120/spl deg/ intervals. This study utilizes a cardiac/chest phantom to compare several triple-detector orbits, with assessment of sensitivity and resolution. A 180/spl deg/ rotation with reconstruction of two of the three heads was evaluated, resulting in overlapping 180/spl deg/ orbits; use of a starting angle of 165/spl deg/ for the first head placed the overlapping portion of the orbits over the LAO myocardial region, where camera-cardiac distance is most favorable. Use of this overlapping orbit yielded resolution equivalent to a conventional (single-head) 180/spl deg/ rotation. Sensitivity was 90% of that of a 90/spl deg/ dual-detector system, and 20% better than the common practice of using a 120/spl deg/ orbit with reconstruction of 1 and 1/2 heads to achieve a 180/spl deg/ orbit. Use of 36O/spl deg/ acquisition with reconstruction of all three heads provided the greatest sensitivity, though at some loss in image quality. Thus, far those centers performing cardiac imaging using a triple detector system, using overlapping 180/spl deg/ orbits is the preferred acquisition choice.
Starting Page	1882
Ending Page	1884
File Size	234821
Page Count	3
File Format	PDF
ISBN	0780325443
DOI	10.1109/NSSMIC.1994.474699
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	1994-10-30
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Orbits Myocardium Head Image reconstruction Detectors Protocols Image resolution Cameras Lungs Back
Content Type	Text
Resource Type	Article

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