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High Quality Cone-beam CT Reconstruction on the GPU

Gabor Jakab, Attila Racz, Kalman Nagy
Mediso Medical Equipment Developing and Service Ltd., Budapest, 1022 Hungary
8th Conference of the Hungarian Association for Image Processing and Pattern Recognition, 2011

@article{jakab2011high,

   title={High Quality Cone-beam CT Reconstruction on the GPU},

   author={Jakab, Gabor and Racz, Attila and Nagy, Kalman},

   year={2011}

}

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The computing power of modern GPUs makes them very suitable for Computed Tomography (CT) image reconstruction. Apart from accelerating the reconstruction, their extra computing performance compared to conventional CPUs can be used to increase image quality in several ways. In this paper we present our upgraded GPU based image acquisition and reconstruction system, including gain correction, beam hardening correction, various reconstruction filters, and a new back-projection method for cone-beam geometry. We experimentally evaluated the impact of wide range of reconstruction filters on the image noise level and the resolution, and we compared the performance of the reconstruction components in phantom studies with special focus on image noise, resolution and ring artefacts.
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