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Proceedings Paper

Computed tomographic images using tube source of x rays: interior properties of the material
Author(s): Donepudi V. Rao; Tohoru Takeda; Yuji Itai; S. M. Seltzer; John H. Hubbell; Tsutomu Zeniya; Takao Akatsuka; Roberto Cesareo; Antonio Brunetti; Giovanni E. Gigante
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Paper Abstract

An image intensifier based computed tomography scanner and a tube source of x-rays are used to obtain the images of small objects, plastics, wood and soft materials in order to know the interior properties of the material. A new method is developed to estimate the degree of monochromacy, total solid angle, efficiency and geometrical effects of the measuring system and the way to produce monoenergetic radiation. The flux emitted by the x-ray tube is filtered using the appropriate filters at the chosen optimum energy and reasonable monochromacy is achieved and the images are acceptably distinct. Much attention has been focused on the imaging of small objects of weakly attenuating materials at optimum value. At optimum value it is possible to calculate the three-dimensional representation of inner and outer surfaces of the object. The image contrast between soft materials could be significantly enhanced by optimal selection of the energy of the x-rays by Monte Carlo methods. The imaging system is compact, reasonably economic, has a good contrast resolution, simple operation and routine availability and explores the use of optimizing tomography for various applications.

Paper Details

Date Published: 7 January 2002
PDF: 9 pages
Proc. SPIE 4503, Developments in X-Ray Tomography III, (7 January 2002); doi: 10.1117/12.452870
Show Author Affiliations
Donepudi V. Rao, Univ. of Tsukuba (India)
Tohoru Takeda, Univ. of Tsukuba (Japan)
Yuji Itai, Univ. of Tsukuba (Japan)
S. M. Seltzer, National Institute of Standards and Technology (United States)
John H. Hubbell, National Institute of Standards and Technology (United States)
Tsutomu Zeniya, Yamagata Univ. (Japan)
Takao Akatsuka, Yamagata Univ. (Japan)
Roberto Cesareo, Univ. degli Studi di Sassari (Italy)
Antonio Brunetti, Univ. degli Studi di Sassari (Italy)
Giovanni E. Gigante, Univ. degli Studi di Roma La Sapienza (Italy)

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

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