What factors effect the resolution if CT images and PET images?
For CT I have come across a few, in terms of
- Ray width
- Dector aperture
- focal spot
Which are common for most x-ray based scan as I understand, but are there more, would the voxel size effect the resolution?
For PET scan through research I have only come across what the account as error, which I suppose would effect the image quality/resolution which are
- Scatter coincidence, or random coincidence
- Position error, where the point rec annihilation on the LOR is not the true annihilation.
- Particle energy error, so loss of energy through thermal processes.
I am also assuming as both detectors are sinitalltors then thickness of the crystal also effects the resolution.
Are there any more factors and do PET and CT share any common one apart from the crystal one that I have listed above?