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Proceedings Paper

Experimental micro-CT system for x-ray NDT
Author(s): Massimo Rossi; Franco Casali; Matteo Bettuzzi; MariaPia Morigi; Davide Romani; Sergei Vasilievic Golovkin; Vladimir N. Govorun
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Paper Abstract

This work describes the setup of an experimental system for microtomography developed in the framework of a collaboration between the Physics Department of the University of Bologna (Italy) and the Geosphaera Research Center of Moscow (Russia). The main goal of this inspection system is to carry out high-resolution analysis in vitro of biomedical samples as well as nondestructive testing (NDT) of industrial components. The detection system consists of a 30x15 mm2 rectangular fiberoptic taper (ratio 2:1) optically coupled to a cooled 12-bit CCD camera (1024x512 pixels). On the entrance window of the taper is deposited a thin layer of Gd2O2S:Tb phosphor which provides the X-light conversion. The image readout is carried out by means of a commercial frame grabber installed on a personal computer and specific software is used for data acquisition and control of the tomographic process. The object under investigation is arranged on a 3-degree micro-positioning system (x-y translation and rotation) and irradiated by an X-ray microfocus beam (up to 200 kVp). The sample can be positioned easily along the source-detector axis in order to obtain a large magnification of details of interest. The X-ray detector has been intensively tested in order to determine its performance in terms of MTF, NPS, and DQE. Moreover, preliminary tests have been carried out on several samples in order to evaluate the performance of the micro-CT system.

Paper Details

Date Published: 7 January 2002
PDF: 11 pages
Proc. SPIE 4503, Developments in X-Ray Tomography III, (7 January 2002); doi: 10.1117/12.452862
Show Author Affiliations
Massimo Rossi, Univ. degle Studi di Bologna (Italy)
Franco Casali, Univ. degli Studi di Bologna (Italy)
Matteo Bettuzzi, Univ. degli Studi di Bologna (Italy)
MariaPia Morigi, Univ. degli Studi di Bologna (Italy)
Davide Romani, Univ. degli Studi di Bologna (Italy)
Sergei Vasilievic Golovkin, Institute for High Energy Physics (Russia)
Vladimir N. Govorun, Institute for High Energy Physics (Russia)

Published in SPIE Proceedings Vol. 4503:
Developments in X-Ray Tomography III
Ulrich Bonse, Editor(s)

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