Fast reconstruction for unconstrained cone-beam tomosynthesis

Beilei Wang; Kenneth Barner; Denny Lee

doi:10.1117/12.534597

6 May 2004 Fast reconstruction for unconstrained cone-beam tomosynthesis

Beilei Wang, Kenneth Barner, Denny Lee

Proceedings Volume 5368, Medical Imaging 2004: Physics of Medical Imaging; (2004) https://doi.org/10.1117/12.534597
Event: Medical Imaging 2004, 2004, San Diego, California, United States

Abstract

Traditional Tomosynthesis requires the X-ray source to be parallel beams or cone beams constrained to the same plane above the object of interest. Commonly, the X-ray sources are placed uniformly around a circle or along a line in the same plane, which demands fixed and high-precision equipment. To eliminate the constraints on the X-ray sources and obtain fast and efficient reconstruction with adequate quality, a fast and unconstrained cone beam Tomosynthesis reconstruction method as well as the corresponding deblurring method is presented in this paper. In this method, two reference balls, whose connecting line is parallel to the detector, are placed above the detector. According to the information provided by these two balls, the X-ray source position and its relative motion are readily calculated for the reconstruction and the corresponding deblurring processes. A layer-by-layer, rather than a voxel-by-voxel, reconstruction is utilized in order to speed up the calculation. This fast and unconstrained cone beam Tomosynthesis has a large commercial value, allowing unconstrained projection acquisition and making portable and relatively cheap Tomosynthesis equipment possible.

Citation Download Citation

Beilei Wang, Kenneth Barner, and Denny Lee "Fast reconstruction for unconstrained cone-beam tomosynthesis", Proc. SPIE 5368, Medical Imaging 2004: Physics of Medical Imaging, (6 May 2004); https://doi.org/10.1117/12.534597

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