CT crown for on-machine scale calibration in Computed Tomography

Alessandro Stolfi, Leonardo De Chiffre

Research output: Chapter in Book/Report/Conference proceedingArticle in proceedingsResearchpeer-review


A novel artefact for on-machine calibration of the scale in 3D X-ray Computed Tomography (CT) is presented. The artefact comprises an invar disc on which several reference ruby spheres are positioned at different heights using carbon fibre rods. The artefact is positioned and scanned together with the workpiece inside the CT scanner producing a 3D reference system for the measurement. The artefact allows a considerable reduction of time by compressing the workflow of calibration, scanning, measurement, and re-calibration. Furthermore, the method allows a considerable reduction of the amount of data generated from CT scanning. A prototype was calibrated on a tactile CMM and its applicability in CT scanning demonstrated using a calibrated workpiece.
Original languageEnglish
Title of host publicationProceedings of euspen’s 16th International Conference & Exhibition
Number of pages2
Publication date2016
Publication statusPublished - 2016
Eventeuspen’s 16th International Conference & Exhibition - East Midlands Conference Centre, Nottingham, United Kingdom
Duration: 30 May 20163 Jun 2016


Conferenceeuspen’s 16th International Conference & Exhibition
LocationEast Midlands Conference Centre
CountryUnited Kingdom


  • Metrology
  • Calibration
  • Computed Tomography (CT)

Fingerprint Dive into the research topics of 'CT crown for on-machine scale calibration in Computed Tomography'. Together they form a unique fingerprint.

Cite this