Image reconstruction device, X-ray CT device, and image reconstruction method
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United States of America Patent
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Dec 29, 2020
Grant Date -
Jun 13, 2019
app pub date -
Jun 16, 2017
filing date -
Jul 4, 2016
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Abstract
In order to determine noise intensity more accurately by a projection data division method using data after fan-parallel conversion, a plurality of projection data obtained by irradiating a scan object with radiations are received and subjected to prescribed data conversion; data after the conversion is divided into two or more sets; a reconstructed image is generated for each set of data; and the generated reconstructed image for each of the sets is subtracted to generate a difference image. An index indicating pixel value variation for at least one prescribed region on the difference image is calculated, the value of the index is corrected by a previously calculated correction value, and the corrected index value is regarded as noise intensity of the region.
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