Advances in the metrological traceability and performance of X-ray computed tomography

X-ray computed tomography (XCT) is increasingly being used for evaluating quality and conformance of complex products, including assemblies additively manufactured parts. The metrological performance traceability XCT nevertheless remains an important research area that reviewed in this paper. error sources influencing measurement results are discussed, along with related qualification, calibration optimization procedures. Moreover, progress on verification testing the determination task-specific uncertainty covered. Results interlaboratory comparisons summarized various dimensional fields illustrated. Conclusions outlook future activities also provided.