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qgao21 / CoreDiff

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About dataset simulation #6

Open cxf426 opened 11 months ago

cxf426 commented 11 months ago

May I ask how to get I0.mat file when simulating mayo data set at low dose

qgao21 commented 11 months ago

"I0" is the number of X-ray incident photons, which can be defined as a matrix or a fixed constant. In our experiments, we simply defined "I0=1.5e5" for normal-dose scans. And the "I0" used for 25% and 5% dose scans is multiplied by the corresponding scaling factor.

We need to mention that if you have the raw data of a CT scan, you can get "I0" from dicom header file or estimate it from the background region.

cxf426 commented 11 months ago

Thank you very much！