Impact of surface determination techniques on dimensional and geometrical metrology using X-ray computed tomography

X-ray Computed Tomography enables non-destructive dimensional and geometrical measurements of both external and internal features, including those that are difficult or impossible to access with contact probes or optical systems. However, the accuracy of XCT-based measurements is influenced by several factors, one of which is surface determination, which defines the surface points of the object within the tomographic data. This work aims to investigate the impact of different surface determination techniques on the evaluation of dimensional and geometrical measurands, with the goal of understanding their influence on measurement results and contributing to improved traceability in XCT-based metrology.