Method for reconstructing CT images with scatter correction, in particular for dual-source CT devices
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United States of America Patent
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Jun 2, 2015
Grant Date -
Oct 3, 2013
app pub date -
Feb 28, 2013
filing date -
Mar 28, 2012
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Abstract
A method is disclosed for reconstructing image data of an examination object from measurement data, wherein the measurement data were acquired in the course of a relative rotational movement between a radiation source of a computed tomography system and the examination object. First image data of the examination object are reconstructed from the measurement data. Scatter signals are calculated from the first image data using a scattered radiation model, wherein the scattered radiation model specifies an angle-dependent scatter distribution for a scatter point as a function of a line integral corresponding to an attenuation integral of a scattered beam from the scatter point to a specific detector element. The calculated scatter signals are used for correcting the measurement data, and second image data are reconstructed using the corrected measurement data.
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