Robustness of geometric verification by segmentation-free X-ray computed tomography

Additive manufacturing technologies can benefit from the use of volumetric representations at design, manufacture, and verification level. Concerning geometric verification, a method has been proposed for testing the conformance to a "volumetric tolerance" specification using X-ray computed tomography (XCT). The method does not require the segmentation of the XCT image, a significant contributor to the measurement uncertainty. This work revises the method, and experimentally investigates its robustness when the XCT scan parameters are varied in the range that guarantees good quality images. The method is proved robust but is also found influenced by the voxel size (image resolution).