| CPC A61B 6/037 (2013.01) [A61B 6/4258 (2013.01); A61B 6/466 (2013.01); A61B 6/469 (2013.01); A61B 6/5264 (2013.01)] | 17 Claims |
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1. A system comprising:
an imaging system to acquire a plurality of tomographic frames of an imaging subject, each of the plurality of tomographic frames associated with a respective projection angle; and
a processing unit to:
determine a region of interest of the imaging subject;
generate a first linear attenuation coefficient map of the imaging subject, the first linear attenuation coefficient map comprising first linear attenuation coefficients associated with respective voxels of the region of interest;
generate a second linear attenuation coefficient map of the imaging subject by increasing the values of the first linear attenuation coefficients associated with the respective voxels of the region of interest and not increasing values of linear attenuation coefficients of the first linear attenuation coefficient map associated with voxels of other regions of the imaging subject;
attenuation-correct the plurality of tomographic frames based on the second linear attenuation coefficient map to generate a second plurality of tomographic frames;
determine tomographic inconsistency of the second plurality of tomographic frames;
attenuation-correct the plurality of tomographic frames based on the first linear attenuation coefficient map to generate a third plurality of tomographic frames; and
reconstruct a three-dimensional image based on the third plurality of tomographic frames and the determined tomographic inconsistency.
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