the Tiff slices is just post process storage. A good DICOM reader can view those tiffs in any direction.

After all, if you have the tiffs, you already know the grayscale for every pixel in the XYZ space. You just need to grab the right pixels from each slice

Interesting stuff! Could you suggest a DICOM reader that does so?

I had assumed slicing the raw beam data would give you much better output resolution whenever there were differences between transaxial and z resolution, since at some angle and offset you end up sampling across the largest gaps in the XYZ pixels. But maybe that's not a real issue? Is this how it's done in practice?