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. Author manuscript; available in PMC: 2009 Jan 23.
Published in final edited form as: IEEE Trans Nucl Sci. 2008 Oct;55(5):2566–2575. doi: 10.1109/TNS.2008.2004557

Figure 2.

Figure 2

A typical simulated sinogram from an image slice. Picture (a) shows the re-projected sinogram from the high mAs CT image slice of Figure 4(a). Picture (b) shows the variance map at 50 mAs level for the mean map of Figure 2(a). Picture (c) shows the low-dose sinogram by adding non-stationary Gaussian noise with variance at 50 mAs level. Picture (d) shows the restored sinogram by the presented KL-PWLS algorithm. The displays are in the full range from zero to maximum pixel intensity respectively.