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. Author manuscript; available in PMC: 2014 Feb 1.
Published in final edited form as: IEEE Trans Nucl Sci. 2013 Feb;60(1):166–173. doi: 10.1109/tns.2012.2233754

Fig. 5.

Fig. 5

Comparison of the FFT and CUDA projector for the symmetric invariant case. The SR kernel has a 900 ps TOF resolution, and 50 mm and 10 mm LOR resolution in the radial and axial directions, respectively. (a) FFT (b) CUDA and (c) (FFT – CUDA) image. [top] transverse, [middle] sagittal and [bottom] coronal view. The sagittal and coronal views are zoomed-in to the center point source for better illustrations.