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. Author manuscript; available in PMC: 2013 Jul 1.
Published in final edited form as: IEEE Trans Med Imaging. 2012 Mar 6;31(7):1461–1471. doi: 10.1109/TMI.2012.2190088

Fig. 14.

Fig. 14

Non-uniform phantom - Transverse (top) and coronal (bottom) images of the non-uniform phantom. Images from reconstructions with (left) list-mode TOF-OSEM and (right) DIRECT-OSEM are shown at 20% image roughness. The hot annular structure near the top of the image is a myocardial insert that was not analyzed in this study. The non-uniform background near this insert is most likely due to inaccuracies in the scatter correction. The calculation of image roughness did not include this non-uniform area.