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Experimental System for X-ray Cone-Beam Microtomography

Published online by Cambridge University Press:  28 July 2005

Shanjen Pan ,
Wenshan Liou ,
Ang Shih ,
Mun-Soo Park ,
Ge Wang ,
Sterling P. Newberry ,
Hyogun Kim ,
Doug M. Shinozaki  and
Ping-Chin Cheng
Shanjen Pan
Affiliation:
Advanced Microscopy and Imaging Laboratory, Department of Electrical and Computer Engineering, State University of New York, Buffalo, NY 14260
Wenshan Liou
Affiliation:
Advanced Microscopy and Imaging Laboratory, Department of Electrical and Computer Engineering, State University of New York, Buffalo, NY 14260
Ang Shih
Affiliation:
Advanced Microscopy and Imaging Laboratory, Department of Electrical and Computer Engineering, State University of New York, Buffalo, NY 14260
Mun-Soo Park
Affiliation:
Advanced Microscopy and Imaging Laboratory, Department of Electrical and Computer Engineering, State University of New York, Buffalo, NY 14260
Ge Wang
Affiliation:
Department of Radiology, University of Iowa, Iowa City, IA 52242
Sterling P. Newberry
Affiliation:
CBI Labs, Box 11, S. Wescott Road, Schenectady, NY 12306
Hyogun Kim
Affiliation:
Department of Material Sciences and Engineering, Kwangju Institute of Science and Technology, Kwangju, Republic of Korea
Doug M. Shinozaki
Affiliation:
Department of Mechanical and Materials Engineering, University of Western Ontario, London, Ontario, N6A 5B7, Canada
Ping-Chin Cheng
Affiliation:
Advanced Microscopy and Imaging Laboratory, Department of Electrical and Computer Engineering, State University of New York, Buffalo, NY 14260
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Abstract

A laboratory test of X-ray tomography employing a diverging beam of X-rays rather than the usual parallel X-ray beam is described. We chose to test and demonstrate the advantages of divergent beam tomography by imaging an extracted juvenile human premolar using an ordinary dental X-ray source and a cooled CCD camera. Experiments with a three-piece cover-glass sample and with the human tooth demonstrated that three-dimensional reconstruction can be achieved at 34 μm per pixel resolution employing an X-ray tube spot 800 μm in its smallest direction without requiring close contact with the fluorescent screen. Reconstruction of a 256 x 256 pixel single-plane image from 100 projection images took only 45 sec on a personal computer with a Pentium 166 MHz processor. We have also demonstrated a volume reconstruction of 256 x 256 x 256 voxels from the data. Successful extension of this work to submicrometer projection X-ray microscopy is predicted. Improved resolution of medical tomography is another possible application.

Keywords

X-raycone-beamtomographymicrotomographyshadow projection X-ray microscopy
Type
Research Article
Information
Microscopy and Microanalysis , Volume 4 , Issue 1 , February 1998 , pp. 56 - 62
Copyright
© 2005 Microscopy Society of America

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