Patent ID: 6198797
Filing Date: 2001-03-06
Classification: A61B,G06T,Y10S

Abstract:
An X-ray CT apparatus for acquiring data while rotating an X-ray tube around a subject, and producing a tomographic image for display by means of a reconstruction operation, comprising:threshold range defining means for specifying CT values for a fat portion in said tomographic image to define a threshold range;measurement start point specifying means for specifying one point in a subcutaneous fat region on the image;subcutaneous fat pixel retrieving means for retrieving pixels within a region on said tomographic image that is composed of continuous pixels having CT values within said threshold range and contains said measurement start point, and identifying these pixels as subcutaneous fat pixels;visceral fat pixel retrieving means for retrieving pixels on said tomographic image that have CT values within said threshold range and are not the subcutaneous fat pixels, and identifying these pixels as visceral fat pixels;fat region image display means for displaying at least either of the subcutaneous fat pixels or the visceral fat pixels in a discriminable mode;area ratio calculating means for calculating the ratio of the area of said subcutaneous fat pixels and the area of said visceral fat pixels;histogram generating means for generating at least one of a histogram of the CT values of said subcutaneous fat pixels and a histogram of the CT values of said visceral fat pixels; andcomposite screen display means for displaying said area ratio and said histograms along with said fat region image on the same screen.