Patent ID: 8989343
Filing Date: 2015-03-24
Classification: A61B,G06T

Abstract:
1. An image processing device for acquiring CT image data by reconstructing projection data which is acquired by performing X-ray CT photography of a region including a metallic body in a subject, the image processing device comprising: a pseudo projection data acquisition unit that acquires pseudo projection data by calculation when a virtual metallic body having a predetermined X-ray absorption coefficient is set in a photographic region of said X-ray CT photography in a pseudo manner based on said projection data; a pseudo CT image data generator that reconstructs said pseudo projection data to generate pseudo CT image data; a virtual metallic body luminance acquisition unit that acquires virtual metallic body luminance that is luminance corresponding to said virtual metallic body in said pseudo CT image data; a position specification unit that specifies a position of a metal equivalent region having luminance corresponding to said virtual metallic body luminance in CT image data or in the pseudo CT image data; a correction processor that acquires correction projection data by performing correction processing to the luminance of said metal equivalent region in said projection data, degradation of X-ray intensity due to X-ray absorption being corrected through the correction processing; and a correction CT image data acquisition unit that reconstructs said correction projection data to acquire correction CT image data.