Influence of Heel effect and of nonuniformity of emitted spectra on dual-energy subtraction in computed radiography

Christiaan M. Fivez; Patrick Wambacq; Paul Suetens; Emile P. Schoeters

doi:10.1117/12.237821

11 April 1996 Influence of Heel effect and of nonuniformity of emitted spectra on dual-energy subtraction in computed radiography

Christiaan M. Fivez, Patrick Wambacq, Paul Suetens, Emile P. Schoeters

Author Affiliations +

Proceedings Volume 2708, Medical Imaging 1996: Physics of Medical Imaging; (1996) https://doi.org/10.1117/12.237821
Event: Medical Imaging 1996, 1996, Newport Beach, CA, United States

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.

Citation Download Citation

Christiaan M. Fivez, Patrick Wambacq, Paul Suetens, and Emile P. Schoeters "Influence of Heel effect and of nonuniformity of emitted spectra on dual-energy subtraction in computed radiography", Proc. SPIE 2708, Medical Imaging 1996: Physics of Medical Imaging, (11 April 1996); https://doi.org/10.1117/12.237821

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