CT measurements with enhanced accuracy
Until recently, length measurements performed by means of industrial X-ray computed tomography (CT) based on cone beam geometry (without additional tactile reference measurements) exhibited relative measurement uncertainties of approx. 1 · 10-4. A procedure developed at PTB allows this uncertainty to be improved by a factor of at least 10. This new development relies on a pixel-resolved distance correction between the X-ray source and the flat-panel detector. Moreover, with this procedure, there is less need for pre-filtering of the X-ray radiation, thus increasing intensity and allowing shorter measuring times. This also reduces measurement uncertainties that may occur during the irradiation of a specimen due to drifting. (Technology Offer 455)
reduces measurement uncertainty without additional reference measurements
increases cost efficiency of CT systems due to reduced measuring times
can be integrated into existing CT facilities – e.g. as a software update
Contact person for questions about technology transfer
Andreas Barthel,
Phone: (0531) 592-8307,
andreas.barthel(at)ptb.de,
www.technologietransfer.ptb.de