Patent ID: 8351565
Filing Date: 2013-01-08
Classification: A61B

Abstract:
1. An X-ray CT apparatus comprising: an electrocardiographic information collecting unit that collects electrocardiographic information; a data collecting unit that collects multidirectional projection data obtained by irradiating a subject with X-rays; an image reconstructing unit that reconstructs a CT image in approximately real time based on the electrocardiographic information collected by the electrocardiographic information collecting unit and the multidirectional projection data collected by the data collecting unit; a concentration calculating unit that calculates, in approximately real time, a CT value of the reconstructed CT image with time within a region of interest, the CT value serving as an indicator of a concentration of a contrast medium; and a reconstruction mode changing unit that changes, in approximately real time, a reconstruction mode of reconstructing the CT image from the multidirectional projection data, during a scan for obtaining an image for examination, based on the concentration calculated by the concentration calculating unit.