search

HPImaging / sv-mbirct

High Performance Model Based Image Reconstruction for Computed Tomography
BSD 3-Clause "New" or "Revised" License
6 stars 7 forks source link

Some questions about CT imaging parameters #12

Closed lijiajun2077 closed 3 years ago

lijiajun2077 commented 3 years ago

This code runs fast, I want to do some tests. But I don’t have sinogram data, I only have a 4096 4096 CT image. I use this code to create the system matrix, and then get the projection from the system matrix and the image. Finally, the projection is used as sinogram data to reconstruct the original image. I don’t know much about CT imaging. I have some questions about CT imaging parameters. For this 4096 4096 CT image, how to set the parameters DeltaChannel, NChannels and Deltaxy? I want to do CT imaging with 480 view angles, and I set the parameter DeltaChannel to 1, NChannels to 1500 and Deltaxy to 0.25. Is this setting the parameters correctly？

sjkisner commented 3 years ago

For a simulation there's not a single correct answer. Those settings should work OK. Note you have to set all these parameters for the sinogram and image geometry before creating the system matrix.