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

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

Publication , Journal Article

Chen, M; Jaszczak, RJ; Bowsher, JE; Gilland, DR

Published in: IEEE Nuclear Science Symposium and Medical Imaging Conference

December 1, 2000

An experimental phantom study was performed to evaluate cardiac uniformity, contrast and SNR for two clinical cardiac SPECT imaging protocols: adjacent dual-head 180° and triple-head 360° scans. Methods: One head of a SPECT camera was used to acquire 180° and 360° projections with different times per step to simulate the clinical case where dual-head 180° and triple-head 360° 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. Results: The 180° scan shows an intensity decrease in anterior apical and posterior basal regions. The 360° scan shows an intensity decrease in the posterior wall. For the anterior lesion the 180° scan has slightly better contrast while for the posterior lesion the 360° scan has slightly better contrast. Conclusions: The difference between the 180° and 360° 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° vs 360° acquisition designed based on these characterizations of contrast, uniformity and noise will be necessary to evaluate overall performance.

Duke Scholars

Author Ronald J. Jaszczak Radiology

Published In

IEEE Nuclear Science Symposium and Medical Imaging Conference

Publication Date

December 1, 2000

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Citation

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Chicago

ICMJE

MLA

NLM

Chen, M., Jaszczak, R. J., Bowsher, J. E., & Gilland, D. R. (2000). An evaluation of cardiac uniformity, contrast and SNR with dual-head 180 degree and triple-head 360 degree SPECT scans. IEEE Nuclear Science Symposium and Medical Imaging Conference, 3.

Chen, M., R. J. Jaszczak, J. E. Bowsher, and D. R. Gilland. “An evaluation of cardiac uniformity, contrast and SNR with dual-head 180 degree and triple-head 360 degree SPECT scans.” IEEE Nuclear Science Symposium and Medical Imaging Conference 3 (December 1, 2000).

Chen M, Jaszczak RJ, Bowsher JE, Gilland DR. An evaluation of cardiac uniformity, contrast and SNR with dual-head 180 degree and triple-head 360 degree SPECT scans. IEEE Nuclear Science Symposium and Medical Imaging Conference. 2000 Dec 1;3.

Chen, M., et al. “An evaluation of cardiac uniformity, contrast and SNR with dual-head 180 degree and triple-head 360 degree SPECT scans.” IEEE Nuclear Science Symposium and Medical Imaging Conference, vol. 3, Dec. 2000.