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Metrology, applications and methods with high energy CT systems

 
: Uhlmann, Norman; Voland, Virginia; Salamon, Michael; Hebele, Stefan; Boehnel, Michael; Reims, Nils; Schmitt, Michael; Kasperl, Stefan; Hanke, Randolf

:
Preprint urn:nbn:de:0011-n-3011689 (5.4 MByte PDF)
MD5 Fingerprint: 30fe26b3bb1c80199f71800eccb81528
Copyright AIP
Created on: 19.11.2014


Chimenti, D. ; American Society for Nondestructive Testing -ASNT-, Columbus/Ohio:
40th Annual Review of Progress in Quantitative Nondestructive Evaluation 2013. Vol.33B. Pt.2 : Incorporating the 10th International Conference on Barkhausen Noise and Micromagnetic Testing; 40th NDE, 10th ICBM; Volume 33A and 33B; Baltimore, Maryland, USA, 21-26 July 2013
Melville/NY: AIP Press, 2014 (AIP Conference Proceedings 1581)
ISBN: 978-0-7354-1213-2
ISBN: 978-0-7354-1211-8
ISBN: 978-1-63266-043-5
pp.1778-1785
Annual Review of Progress in Quantitative Nondestructive Evaluation <40, 2013, Baltimore/Md.>
International Conference on Barkhausen Noise and Micromagnetic Testing <10, 2013, Baltimore/Md.>
English
Conference Paper, Electronic Publication
Fraunhofer IIS ()
computed tomography; high energy; linear accelerator; CT metrology

Abstract
The increase of Computed Tomography (CT) as an applicable metrology and Non Destructive Testing (NDT) method raises interest on developing the application fields to larger objects, which were rarely used in the past due to their requirements on the imaging system. Especially the classical X-ray generation techniques based on standard equipment restricted the applications of CT to typical material penetration lengths of only a few cm of steel. Even with accelerator technology that offers a suitable way to overcome these restrictions just the 2D radioscopy technique found a widespread application. Beside the production and detection of photons in the MeV range itself, the achievable image quality is limited using standard detectors due to the dominating absorption effect of Compton Scattering at high energies. Especially for CT reconstruction purposes these effects have to be considered on the development path from 2D to 3D imaging. Most High Energy CT applications are therefore based on line detectors shielding scattered radiation to a maximum with an increase in imaging quality but with time consuming large volume scan capabilities. In this contribution we present the High-Energy X-ray Imaging project at the Fraunhofer Development Centre for X-ray Technology with the characterization and the potential of the CT-system according to metrological and other application capabilities.

: http://publica.fraunhofer.de/documents/N-301168.html