Novel features of the x-ray scatter profile that are not modeled by convolution of the primary

J. Eric Tkaczyk; Yves Trousset; Deborah Walter; Yanfeng Du; Richard A. Thompson; Daniel Harrison

doi:10.1117/12.653747

3 March 2006 Novel features of the x-ray scatter profile that are not modeled by convolution of the primary

J. Eric Tkaczyk, Yves Trousset, Deborah Walter, Yanfeng Du, Richard A. Thompson, Daniel Harrison

Author Affiliations +

Proceedings Volume 6142, Medical Imaging 2006: Physics of Medical Imaging; 614232 (2006) https://doi.org/10.1117/12.653747
Event: Medical Imaging, 2006, San Diego, California, United States

Abstract

A convolution model of scatter that is adaptable to rapid simulation and correction algorithms is tested against the measured scatter profiles. In the simple case of a uniform acrylic sheet, the convolution approach yields about 10% absolute agreement with the measured scatter profile. However, significant qualitative differences are demonstrated for phantoms with non-uniform thickness or composition. For example, the scatter profile is dependent on a bone's vertical position in the phantom whereas the primary is unchanged. Similarly, a cusp shape in the scatter profile observed near the abrupt edge of an acrylic sheet is not produced in the convolution model. An alternate approach that calculates the scatter as a 3D integral over the object volume can reproduce this behavior.

Citation Download Citation

J. Eric Tkaczyk, Yves Trousset, Deborah Walter, Yanfeng Du, Richard A. Thompson, and Daniel Harrison "Novel features of the x-ray scatter profile that are not modeled by convolution of the primary", Proc. SPIE 6142, Medical Imaging 2006: Physics of Medical Imaging, 614232 (3 March 2006); https://doi.org/10.1117/12.653747

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