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Proceedings Paper

Correction techniques for detector systems in 3D-CT
Author(s): Bernhard Illerhaus; Juergen Goebbels; Heinrich Riesemeier; Hendrik Staiger
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Paper Abstract

At BAM 3D-computerized tomography (3D-CT) using x-ray cone beam and area detectors is established as a standard method for materials testing and development. Up to now main applications concerned fiber reinformed plastics and ceramics, density distribution in ceramics, powder metallurgical parts and archaeological objects. Spatial and density resolution depends on the object and on the combination x-ray source - detector system. The maximum spatial resolution is 5 micrometers using a transmission target and 12 micrometers using a standard micro focus tube together with an image intensifier as detector. The main problem of image intensifiers applied to 3D-CT is the rather bad contrast ratio of about 20:1. An object dependent correction for the light scattering in the image intensifier in combination with bam hardening correction is performed at BAM. This contribution will point out the advantages and disadvantages of different detector systems and results will be shown on test samples and selected investigation from our ongoing work.

Paper Details

Date Published: 24 October 1997
PDF: 6 pages
Proc. SPIE 3149, Developments in X-Ray Tomography, (24 October 1997); doi: 10.1117/12.279350
Show Author Affiliations
Bernhard Illerhaus, Bundesanstalt fuer Materialforschung und -pruefung (Germany)
Juergen Goebbels, Bundesanstalt fuer Materialforschung und -pruefung (Germany)
Heinrich Riesemeier, Bundesanstalt fuer Materialforschung und -pruefung (Germany)
Hendrik Staiger, Bundesanstalt fuer Materialforschung und -pruefung (Germany)

Published in SPIE Proceedings Vol. 3149:
Developments in X-Ray Tomography
Ulrich Bonse, Editor(s)

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