Maximum likelihood reconstruction of circular cone-beam CT data

Andy Ziegler; Thomas Köhler

doi:10.1117/12.650656

2 March 2006 Maximum likelihood reconstruction of circular cone-beam CT data

Andy Ziegler, Thomas Köhler

Proceedings Volume 6142, Medical Imaging 2006: Physics of Medical Imaging; 614246 (2006) https://doi.org/10.1117/12.650656
Event: Medical Imaging, 2006, San Diego, California, United States

Abstract

The behavior of a Maximum Likelihood reconstruction algorithm applied to circular cone-beam CT data is examined. In a simulation study, it is shown that unacceptable artifacts appear, if a constant initial image is used. A start image that incorporates the borders of the reconstructed object correctly improves the situation, but artifacts remain that degrade the image quality. If the initial image is generated from a low-dose helical pre-scan, a cone-beam artifact free image is achieved.

Citation Download Citation

Andy Ziegler and Thomas Köhler "Maximum likelihood reconstruction of circular cone-beam CT data", Proc. SPIE 6142, Medical Imaging 2006: Physics of Medical Imaging, 614246 (2 March 2006); https://doi.org/10.1117/12.650656

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