Estimation of measurement uncertainties in X-ray computed tomography metrology using the substitution method

Pavel Müller, Jochen Hiller, Y. Dai, J. L. Andreasen, Hans Nørgaard Hansen, Leonardo De Chiffre

Research output: Contribution to journalJournal articleResearchpeer-review


This paper presents the application of the substitution method for the estimation of measurement uncertainties using calibrated workpieces in X-ray computed tomography (CT) metrology. We have shown that this, well accepted method for uncertainty estimation using tactile coordinate measuring machines, can be applied to dimensional CT measurements. The method is based on repeated measurements carried out on a calibrated master piece. The master piece is a component of a dose engine from an insulin pen. Measurement uncertainties estimated from the repeated measurements of the master piece were transferred on to additionally scanned uncalibrated workpieces which provided the necessary link for achieving traceable measurements. © 2014 CIRP.
Original languageEnglish
JournalCIRP Journal of Manufacturing Science and Technology
Issue number3
Pages (from-to)222-232
Publication statusPublished - 2014


  • Calibrated workpieces
  • CT
  • CT ball plate
  • ISO 15530-3
  • Master piece
  • Measurement uncertainty
  • Reference objects
  • Substitution method
  • X-ray computed tomography
  • Calibration
  • Computerized tomography
  • Measurements
  • Units of measurement
  • X rays
  • Ball plate
  • Uncertainty analysis

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