Patent ID: 7840255
Filing Date: 2010-11-23
Classification: A61B

Abstract:
1. An X-ray CT apparatus comprising: an X-ray tube for radiating X-ray to a subject so as to scan the subject; an X-ray detector for detecting the radiated X-ray; a reconstruction unit for reconstructing an image within the subject based on an obtained projection data; a contrast-medium injector controlling unit configured to control an injector so that the injector continuously injects a contrast medium into a subject by controlling the injector to inject the contrast medium at a first speed for a first time interval and to inject the contrast medium at a second speed for a second time interval following the first time interval, to obtain a state in which a concentration of the contrast medium in a myocardial portion of the subject is considered to be at a preset desired constant value; an image generating unit configured to generate the image based on the projection data once in the state in which the concentration of the contrast medium in the myocardial portion of the subject is considered to be at the preset desired constant value; and a blood-flow image generating unit configured to generate a blood flow image representing a blood flow rate in myocardium by removing components of a myocardial tissue from a portion of a myocardial region of the image generated by the image generating unit.