Accuracy of industrial computed tomography measurements: Experimental results from an international comparison

X-ray computed tomography (CT) is increasingly used in industry for dimensional quality control purposes. However, due to numerous and complex error sources and to the current lack of standardization, industrial users are facing difficulties in the evaluation of CT measurements uncertainty and metrological performance of CT systems. This paper analyses the state of the art in industrial CT metrology, with focus on accuracy and traceability issues, by examining specific results obtained from the first international intercomparison of CT systems for dimensional metrology. The intercomparison involved 15 CT systems operated by expert users in Europe, America and Asia.