TIGRE
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MLEM may cause extreme values on recon
Code to reproduce the problem (If applicable)
geo=defaultGeometry('nVoxel',[128;128;128]);
angles=linspace(0,2*pi,100); head=headPhantom(geo.nVoxel);
projections=Ax(head,geo,angles,'interpolated') noise_projections=addCTnoise(projections);
imgMLEM=MLEM(noise_projections,geo,angles,20)
plotImg(imgMLEM,'Dim','Z')
Specifications
When the MLEM algorithm is used to reconstruct the noise_projections ,the image cannot be reconstructed and is completely black. the image can be reconstructed by the projections.
- MATLAB version: R2021a
- OS:
- CUDA version: 11.04
MLEM works well, but there are few numerical values that are very large, thus hides the data when visualizing without bounds. If you do
plotImg(imgMLEM,'Dim','Z','clims',[0 1])
You will see that the result is good and there. Leave this issue open, as I think we should have better numerical stability for the edge cases, so it may need improving.
Thanks a lot, the result is good.