Patent ID: 7778381
Filing Date: 2010-08-17
Classification: A61B

Abstract:
1. An X-ray computed tomography (CT) apparatus comprising: an X-ray generator and an X-ray detector arranged opposite to said X-ray generator, said X-ray generator and said X-ray detector configured to rotate about a center of rotation, said X-ray detector further configured to detect X-rays transmitted by said X-ray generator through a subject; a condition setting device configured to set a plurality of X-ray tube voltages for use in acquiring X-ray projection data; an X-ray data acquisition device configured to acquire a respective X-ray projection data set for each of the plurality of X-ray tube voltages; an image reconstruction device configured to image-reconstruct X-ray projection data sets acquired by said X-ray data acquisition device to form a plurality of tomographic images; and an image display configured to display the plurality of tomographic images, wherein said condition setting device is further configured to calculate a respective value of an imaging condition for each of the plurality of X-ray tube voltages such that respective image noise values associated with each of the plurality of X-ray tube voltages are substantially identical to one another, and to set the imaging condition to the calculated value for acquiring the X-ray projection data using the plurality of X-ray tube voltages.