Abstract: An X-ray CT apparatus 1 stores an image quality improvement table 3 indicating levels of image quality improvement effects for a plurality of image quality improvement processes in a storage device 123. In a case where imaging is performed while modulating an X-ray irradiation amount on the basis of predetermined dose modulation data, an image processing device 122 acquires a reference dose used as a reference of image quality, and acquires an irradiation X-ray dose during imaging for image reconstruction target projection data from the dose modulation data. The image processing device 122 determines an image quality improvement process for obtaining image quality used as a reference by referring to the image quality improvement table 3 on the basis of a ratio between the dose values, and performs the determined image quality improvement process on the reconstruction target projection data.

Abstract: An X-ray CT apparatus 1 stores an image quality improvement table 3 indicating levels of image quality improvement effects for a plurality of image quality improvement processes in a storage device 123. In a case where imaging is performed while modulating an X-ray irradiation amount on the basis of predetermined dose modulation data, an image processing device 122 acquires a reference dose used as a reference of image quality, and acquires an irradiation X-ray dose during imaging for image reconstruction target projection data from the dose modulation data. The image processing device 122 determines an image quality improvement process for obtaining image quality used as a reference by referring to the image quality improvement table 3 on the basis of a ratio between the dose values, and performs the determined image quality improvement process on the reconstruction target projection data.

Abstract: In order to provide a medical image diagnosis apparatus and a phase determination method using a medical image diagnosis apparatus that can determine an appropriate movement phase when obtaining a tomographic image corresponding to a specific movement phase, there are provided a storage unit that stores material distribution information, which is acquired from an object including a target organ that moves periodically, and movement information, which is measured together with the material distribution information, an image reconstruction unit that reconstructs a plurality of tomographic images of different movement phases using the material distribution information and the movement information, a superimposed image creation unit that creates a superimposed image by superimposing the plurality of tomographic images, a specific position calculation unit that calculates a specific position of the target organ based on the superimposed image, and a specific phase determination unit that determines a specific phas

Abstract: In order to provide a medical image diagnosis apparatus and a phase determination method using a medical image diagnosis apparatus that can determine an appropriate movement phase when obtaining a tomographic image corresponding to a specific movement phase, there are provided a storage unit that stores material distribution information, which is acquired from an object including a target organ that moves periodically, and movement information, which is measured together with the material distribution information, an image reconstruction unit that reconstructs a plurality of tomographic images of different movement phases using the material distribution information and the movement information, a superimposed image creation unit that creates a superimposed image by superimposing the plurality of tomographic images, a specific position calculation unit that calculates a specific position of the target organ based on the superimposed image, and a specific phase determination unit that determines a specific phas