For particularly flat samples (e.g. printed circuit boards, car doors, battery packs), specialty scanning methods are employed. With circular CT, some of the X-ray projections would inevitably include rays nearly parallel to the object, leading to significantly varying absorption rates over all projections.
A technique designed for these cases is the so-called laminography. Instead of rotating the object around its primary axis, the object is tilted slightly and then rotated about the normal to its plane. While this avoids large differences in the absorption between projections, it causes all projections to originate from the same general direction. This is called a limited angle problem.
Conventional reconstruction algorithms often completely fail under these circumstances, producing unusable results. The Voxray solution achieves drastically better results in limited angle setups.