Reduced field-of-view system for imaging compact embedded structures
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United States of America
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Mar 29, 1994
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app pub date -
Apr 22, 1993
filing date -
Apr 22, 1993
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Abstract
A CT apparatus for scanning compact structures associated with a larger body uses radiation source producing a reduced field-of-view to simplify construction and reduce exposure of the larger body. Truncation artifacts in the reconstructed image caused by volume elements in the larger body imaged by the radiation beam only for projections at some angles, are reduced by acquiring two projections at two different energies and combining those projections to compensate for the attenuation of the radiation by the volume elements of the larger body.
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