Correction strategies for the use of a conventional micro-CT cone beam machine for metrology applications

This paper describes the correction methods applied at the University of Zaragoza for the measurement of two items used in the first CT international inter-comparison (CT Audit) when using a non-measuring oriented CT machine. These methods were developed to correct independently the threshold and the scale factor. The corrections were performed by classifying the parts into two different categories depending on their geometrical features. The results obtained are presented, showing how they can improve the accuracy by decreasing the measurement errors.