Images reconstructed from non-attenuated data contaminated with Gaussian random
noise. Images (a-c) were reconstructed by use of the WISE method with a
quadratic penalty with βQ =
1.0×10−3, 1.0×10−2,
and 1.0×10−1, respectively. Image (d) was
reconstructed by use of the WISE method with a TV penalty with
βTV=5.0×10−4.
The insert in the up right corner of each image is the zoomed-in image of the
dashed black box, which contains 35×35 pixels
(17.5×17.5mm2). The grayscale window is
[1.46,1.58] mm/μs.