NDLI: Attenuation correction for rotating slant-hole (RSH) SPECT using exact rebinning

Content Provider	IEEE Xplore Digital Library
Author	Wagner, J.-M. Noo, F. Clackdoyle, R. Bal, G. Christian, P.
Copyright Year	2002
Description	Author affiliation: Electricity Montefiore Inst., Liege Univ., Belgium (Wagner, J.-M.)
Abstract	We have recently derived an analytic method of image reconstruction for the RSH SPECT scanner for cardiac imaging. The method assumes that the emission activity lies in a region of constant attenuation. It operates by rebinning the three-dimensional (SD) measured projections to a stack of two-dimensional (2D) slices and performing 2D reconstruction in a second step. An important consequence of this method is a mathematical proof that opposing projections are not necessary for full tomographic reconstruction in the presence of attenuation. We have now tested our algorithm in the presence of noisy projection data and with projections which violates the constant attenuation assumption. We present results from simulated and real phantom data demonstrating effective attenuation correction in the presence of a uniform low-level of background in the torso, with truncated liver activity, and without opposing views. Our conclusions are that attenuation correction can be performed for RSH SPECT without measuring opposing views, and that the effect of background activity (which violates the assumptions required for exponential data) and truncated activity of a nearby liver are small and easily dominated by typical noise levels in SPECT imaging.
Starting Page	1527
Ending Page	1530
File Size	728953
Page Count	4
File Format	PDF
ISBN	0780373243
ISSN	10823654
DOI	10.1109/NSSMIC.2001.1008628
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2001-11-04
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Image reconstruction Performance evaluation Liver Image analysis Tomography Testing Imaging phantoms Torso Attenuation measurement Noise measurement
Content Type	Text
Resource Type	Article

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