NDLI: An evaluation of cardiac uniformity, contrast and SNR with dual-head 180 degree and triple-head 360 degree SPECT scans

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An evaluation of cardiac uniformity, contrast and SNR with dual-head 180 degree and triple-head 360 degree SPECT scans

Content Provider	IEEE Xplore Digital Library
Author	Chen, M. Jaszczak, R.J. Bowsher, J.E. Gilland, D.R.
Copyright Year	2000
Description	Author affiliation: Dept. of Radiol., Duke Univ. Med. Center, Durham, NC, USA (Chen, M.)
Abstract	An experimental phantom study was performed to evaluate cardiac uniformity, contrast and SNR for two clinical cardiac SPECT imaging protocols: adjacent dual-head 180/spl deg/ and triple-head 360/spl deg/ scans. One head of a SPECT camera was used to acquire 180/spl deg/ and 360/spl deg/ projections with different times per step to simulate the clinical case where dual-head 180/spl deg/ and triple-head 360/spl deg/ each takes a total of 20 minutes. Scans were acquired with no lesion, anterior lesion and posterior lesion in the myocardium. Maximum a posteriori (MAP) reconstruction was done by Iterative Coordinate Descent (ICD) algorithm using a quadratic convex prior. The L-curve method was used to obtain the prior strength. Images both with attenuation and scatter correction (ASC) and without ASC were compared. The 180/spl deg/ scan shows an intensity decrease in anterior apical and posterior basal regions. The 360/spl deg/ scan shows an intensity decrease in the posterior wall. For the anterior lesion the 180/spl deg/ scan has slightly better contrast while for the posterior lesion the 360/spl deg/ scan has slightly better contrast. In conclusion, the difference between the 180/spl deg/ and 360/spl deg/ scans is subtle and the comparison results depend on the lesion position and the view angle of the heart. A receiver operating characteristic (ROC) study of 180/spl deg/ vs. 360/spl deg/ acquisition designed based on these characterizations of contrast, uniformity and noise will be necessary to evaluate overall performance.
File Size	810833
File Format	PDF
ISBN	0780365038
ISSN	10823654
DOI	10.1109/NSSMIC.2000.949234
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2000-10-15
Publisher Place	France
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Lesions Imaging phantoms Performance evaluation Protocols Magnetic heads Cameras Myocardium Image reconstruction Iterative algorithms Attenuation
Content Type	Text
Resource Type	Article

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