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Proceedings Paper

X-ray cone beam CT system calibration
Author(s): Pascal Sire; Philippe Rizo; M. Martin
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Paper Abstract

Recently x-ray cone beam computed tomography (CT) has become of interest for nondestructive testing (NDT) of advanced materials. Such a technique takes advantage of the cone beam geometry, to reduce the acquisition time and increase the resolution. Performances of CT systems rely mainly on geometric precision and measurement quality. Inaccurate geometry or incorrect data produce artifacts and blurring which limit the spatial resolution. A precise geometric calibration procedure is required and some corrections must be applied to the raw attenuation data in order to obtain accurate measurements. An x-ray cone beam CT system has been developed at the LETI. This machine was designed to control small parts limited to a few centimeters, with a high spatial resolution close to 30 microns. This paper introduces the machine setup and describes the calibration computing resources involved in the system. Then, we discuss the performances on experimental data.

Paper Details

Date Published: 16 December 1993
PDF: 11 pages
Proc. SPIE 2009, X-Ray Detector Physics and Applications II, (16 December 1993);
Show Author Affiliations
Pascal Sire, LETI/CEA (France)
Philippe Rizo, LETI/CEA (France)
M. Martin, LETI/CEA (France)

Published in SPIE Proceedings Vol. 2009:
X-Ray Detector Physics and Applications II
Victor J. Orphan, Editor(s)

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