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- W2003174688 abstract "Purpose: Interior tomography has been recognized as one of the most effective approaches in computed tomography (CT) to reduce radiation dose rendered to patients. In this work, the authors propose and evaluate an imaging method of radial differential interior tomography. Methods: In interior tomography, an x-ray beam is collimated to only irradiate the region of interest (ROI) with suspected lesions while the surrounding area/volume of normal tissues/organs is spared. In the proposed imaging method of radial differential interior tomography, the outcome is a ROI image that has gone through a radial differential filtering. The image reconstruction algorithm for the radial differential interior tomography is kept in the fashion of differentiated backprojection and projection onto convex sets, but the requireda priori knowledge in a small round area becomes zero and may be more readily available in practice. Results: Using the projection data simulated by computer and acquired by CT scanner, the authors evaluate and verify the performance of the proposed radial differential interior tomography method and its associated image reconstruction algorithm. The preliminary results show that the proposed imaging method can generate an image that is the radial differentiation of a conventional tomographic image and is robust over noise that inevitably exist in practice. Conclusions: It is believed that the proposed imaging method may find its utility in advanced clinical applications wherein a ROI-based image processing and analysis is required for lesion visualization, characterization, and diagnosis." @default.
- W2003174688 created "2016-06-24" @default.
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- W2003174688 date "2013-08-21" @default.
- W2003174688 modified "2023-10-10" @default.
- W2003174688 title "Radial differential interior tomography and its image reconstruction with differentiated backprojection and projection onto convex sets" @default.
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- W2003174688 doi "https://doi.org/10.1118/1.4812676" @default.
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