| 摘要 |
PROBLEM TO BE SOLVED: To provide an X-ray CT apparatus which can generate a myocardial perfusion image in a shorter time while reducing the amount of injection of a contrast medium to a subject, as well as X-ray dosage. SOLUTION: The X-ray CT apparatus 1 includes: a scanning control device 18 which obtains a constant concentration period in which a concentration of the contrast medium in a myocardial portion can be considered to be constant following a concentration transition period defined to be a period from immediately after starting of a continuously injection of the contrast medium into the subject P until the contrast medium injected reaches to the myocardium, increases, and becomes in a state where it can be considered that the contrast medium is saturated in a constant value; an image acquisition unit 24c which collects contrast CT image data synchronously with an electrocardiogram during the constant concentration period and the concentration transition period; a slice-thickness adder unit 24b which reduces the resolution of the contrast CT image data in the slice direction; and a blood-flow image generating unit 24e which generates a blood-flow image from the contrast CT image data with reduced resolution collected during the constant concentration period and the concentration transition period. COPYRIGHT: (C)2011,JPO&INPIT |
