Accurate image reconstruction from few-views and limited-angle data in divergent-beam CT

Details Accurate image reconstruction from few-views and limited-angle data in divergent-beam CT Accurate image reconstruction from few-views and limited-angle data in divergent-beam CT

2009-04-28

arxiv.org/abs/0904.4495v1

E. Y. Sidky and C.-M. Kao and X. Pan, "Accurate image reconstruction from few-views and limited-angle data in divergent-beam C

Physics

Medical Physics

appeared in Journal of X-Ray Science and Technology

Scientific paper

In practical applications of tomographic imaging, there are often challenges for image reconstruction due to under-sampling and insufficient data. In computed tomography (CT), for example, image reconstruction from few views would enable rapid scanning with a reduced x-ray dose delivered to the patient. Limited-angle problems are also of practical significance in CT. In this work, we develop and investigate an iterative image reconstruction algorithm based on the minimization of the image total variation (TV) that applies to divergent-beam CT. Numerical demonstrations of our TV algorithm are performed with various insufficient data problems in fan-beam CT. The TV algorithm can be generalized to cone-beam CT as well as other tomographic imaging modalities.

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