Method and system for substantially reducing artifacts in circular cone beam computer tomography (CT)
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United States of America Patent
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May 20, 2014
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Apr 25, 2013
app pub date -
Oct 19, 2011
filing date -
Oct 19, 2011
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Abstract
Cone beam artifacts arise in circular CT reconstruction. The cone beam artifacts are substantially removed by reconstructing a reference image from measured data at circular source trajectory, generating synthetic data by forward projection of the reference image along a pre-determined source trajectory, which supplements the circular source trajectory to a theoretically complete trajectory, reconstructing a correction image from the synthetic data and substantially reducing the cone beam artifacts by generating a corrected image using the reference image and the correction image.
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