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. Author manuscript; available in PMC: 2015 Feb 7.
Published in final edited form as: Phys Med Biol. 2014 Jan 17;59(3):541–559. doi: 10.1088/0031-9155/59/3/541

Figure 4.

Figure 4

Comparison of image reconstruction using a matched and an unmatched image blurring matrix. (a) The simulated phantom image which consists of a warm background, a hot region and a cold region; (b) reconstructed image using the matched image blurring matrix; (c) reconstructed image using the unmatched image blurring matrix. (d) and (e) are zoom-in images corresponding to (b) and (c), respectively. The zoom-in area is marked by the rectangle in (a). The arrows in (e) point to the artifacts which are more pronounced than those in (d).