Patent ID: 8983025
Filing Date: 2015-03-17
Classification: A61B,G01T

Abstract:
1. An X-ray CT apparatus comprising: an X-ray source configured to irradiate X-rays to an object to be examined; an X-ray detector disposed facing the X-ray source, and configured to detect the X-rays transmitted through the object; a scanner in which the X-ray source and the X-ray detector are mounted, configured to rotate them around the object, for a plurality of views; an image reconstruction device configured to reconstruct a tomographic image of the object based on a dose of the transmitted X-rays detected by the X-ray detector; image display device configured to display the tomographic image reconstructed by the image reconstruction device; a storage device that stores a mathematical function, or a table, representing a relationship between (a) a first value equivalent to cross-sectional area of a phantom calculated based on measured data of the phantom detected by the X-ray detector and (b) a second value corresponding to radiation dose absorbed in the phantom including scattered X-rays; and a radiation dose calculating device configured