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Proceedings Paper

Influence of Heel effect and of nonuniformity of emitted spectra on dual-energy subtraction in computed radiography
Author(s): Christiaan M. Fivez; Patrick Wambacq; Paul Suetens; Emile P. Schoeters
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Paper Abstract

Because of beam hardening in the target, the energy distribution of the x-radiation emitted by a conventional x-ray tube differs from different directions of emission. This fact is generally neglected in dual-energy subtraction imaging. In this paper we study the influence of the non- uniformity of the energy spectrum of emitted radiation on dual-energy subtraction. Experiments with synthetic (aluminum) phantoms and with dual-energy images of humanoid chests (made with a computed radiography system) give more insight in the degree to which dual-energy subtraction is affected by the described effects.

Paper Details

Date Published: 11 April 1996
PDF: 11 pages
Proc. SPIE 2708, Medical Imaging 1996: Physics of Medical Imaging, (11 April 1996); doi: 10.1117/12.237821
Show Author Affiliations
Christiaan M. Fivez, Univ. Ziekenhuis Gasthuisberg (Belgium)
Patrick Wambacq, Katholieke Univ. Leuven (Belgium)
Paul Suetens, Univ. Ziekenhuis Gasthuisberg (Belgium)
Emile P. Schoeters, Agfa-Gevaert NV (Belgium)


Published in SPIE Proceedings Vol. 2708:
Medical Imaging 1996: Physics of Medical Imaging
Richard L. Van Metter; Jacob Beutel, Editor(s)

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