Patent ID: 8160338
Filing Date: 2012-04-17
Classification: A61B

Abstract:
1. An X-ray CT apparatus for exposing X-rays to an object so as to scan the object and reconstructing a CT image in the object based on obtained projection data, comprising: a transformation table acquiring unit configured to obtain a transformation table for transforming information representing a concentration of a contrast medium in a myocardium into a blood flow value image of the myocardium based on a CT image acquired in a concentration transition period defined to be a period from immediately after starting of a continuous injection of the contrast medium into the object until the contrast medium injected reaches the myocardium, increases in concentration, and is in a state in which the contrast medium is saturated at a constant value; a blood-flow information acquisition unit configured to obtain information representing the concentration of the contrast medium in the myocardium of the object based on a CT image acquired during a constant concentration period during which the concentration of the contrast medium in the myocardium can be considered to be constant; and a blood-flow image generating unit configured to generate a blood flow value image based on the information representing the concentration of the contrast medium in the myocardium according to the transformation table.