Influence of measurement parameters settings on the results of the CT measurement

Abstract

Nowadays X-ray computed tomography for industrial applications is most frequently used for defectoscopy analysis or nondestructive testing. However, it is increasingly used for geometric measurements. The accuracy of geometric measurements is influenced by many factors such as: measurement parameters (X-ray tube and detector settings), environmental conditions, reconstruction algorithms, element alignment, threshold value etc. The article presents the influence of setting parameters of the X-ray tube (voltage and current) and detector (integration time and gain) on the results of geometric measurements. Studies were performed using Carl Zeiss computer tomograph METROTOM 800. Ceramic balls (Si3N4) of G5 accuracy class were selected as the reference master artifacts.