Patent ID: 9292946
Filing Date: 2016-03-22
CPC Classification: A61B,G01T,G06T

Claim Text:
1. An X-ray computer tomography apparatus comprising: at least one X-ray tube configured to generate X-rays; a plurality of first detector elements of an energy integrating type, configured to detect an intensity of X-rays generated from the X-ray tube and transmitted through an object; a plurality of second detector elements of a photon counting type, configured to detect a spectrum of X-rays generated from the X-ray tube and transmitted through the object; at least one data acquisition circuit configured to acquire first projection data detected by the plurality of first detector elements and second projection data which is detected by the plurality of second detector elements and is smaller in data amount than the first projection data; an arithmetic circuit configured to compute a minimum value of a predetermined cost function based upon the first projection data and the second projection data by executing an iterative reconstruction algorithm; and a reconstruction circuit configured to reconstruct an image of the object based upon the first projection data and the second projection data, which correspond to the minimum value of the cost function.