Patent ID: 9020220
Filing Date: 2015-04-28
Classification: A61B

Abstract:
1. An X-ray CT apparatus comprising: an acquisition device configured to acquire data representing a tomographic image of an imaging target by performing a pre-scan on the imaging target prior to performing a main scan; a setting device configured to set a setup X-ray tube voltage and a setup X-ray dose used for the main scan on said imaging target; an estimation device configured to estimate an index corresponding to a value converted into a section area of an object as a section area of the imaging target, wherein the object is made of one of acrylics and other predetermined materials such that the object provides an equal dose for a case where a scan radiating X-ray defined from a predetermined reference dose is performed at the setup X-ray tube voltage, the estimation device configured to estimate the index based on a scan condition used for the pre-scan and the acquired data; a specifying device configured to specify a dose corresponding to the estimated index based on a relationship between the estimated index and a dose for the case where the scan radiating X-ray defined from the predetermined reference dose is performed at the setup X-ray tube voltage; and a calculation device configured to calculate an exposed dose for the imaging target for a case where the main scan is performed at the setup X-ray tube voltage and the setup X-ray dose, based on the specified dose.