X-ray computer tomography apparatus and image processing apparatus

An X-ray computer tomography apparatus comprising:

• an X-ray tube which generates X-rays;
• an X-ray detector which detects X-rays transmitted through an object;
• a rotating mechanism which continuously rotates the X-ray tube and the X-ray detector around the object;
• a reconstruction unit which reconstructs one of multislice image data and volume image data based on projection data detected by the X-ray detector;
• a profile generating unit which generates a plurality of CT value profiles in a slice direction which respectively correspond to a plurality of pixels in a slice by using the image data;
• a profile portion extraction unit which extracts a profile portion exceeding a predetermined threshold from each of the CT value profiles;
• a scattered radiation distribution estimation unit which estimates a scattered radiation distribution centered on the profile portion, based on a CT value integral and width of the profile portion;
• and
• a scattered radiation correction unit which corrects the image data based on the estimated scattered radiation distribution.