Abstract: A magnetic resonance imaging apparatus according to an embodiment includes processing circuitry. The processing circuitry performs at least one of data collection for collecting first data of an imaging region of a subject at a plurality of time intervals after a tag pulse is applied to fluid flowing into the imaging region, and data collection for collecting second data of the imaging region by differing at least one of applying or not-applying the tag pulse and a position of the applying. The processing circuitry performs phase correction for at least one of the first data and the second data by using data in which the longitudinal magnetization of the fluid is a positive value, to generate an image for each time phase.

Abstract: A magnetic resonance imaging apparatus according to an embodiment includes processing circuitry. The processing circuitry generates an image based on a magnetic resonance signal from a subject. The processing circuitry generates a susceptibility image representing magnetic susceptibility of the subject from a phase component contained in a plurality of pixels in the image. The processing circuitry generates an artifact component of the susceptibility image based on a frequency signal obtained by frequency transform of the susceptibility image. The processing circuitry generates an artifact component-removed susceptibility image by removing the artifact component from a susceptibility image generated based on the magnetic resonance signal.

Abstract: A magnetic-resonance imaging apparatus of an embodiment includes acquiring circuitry and processing circuitry. The acquiring circuitry acquires a magnetic resonance signal that is generated from a subject. The processing circuitry creates a phase image based on the magnetic resonance signal. The processing circuitry sets a combination of a plurality of filters that are used to remove a phase variation derived from a background magnetic field according to a region in the phase image. The processing circuitry removes a phase variation derived from the background magnetic field from the phase image by using the combination of the filters.

Abstract: A medical image processing apparatus according to an embodiment includes processing circuitry and a display. The processing circuitry obtains first imaged data taken of a subject and second imaged data taken of the subject on a date/time different from the date/time on which the first imaged data was taken. The processing circuitry generates estimation data by performing an image processing process that changes the first imaged data on the basis of a predetermined change model. The processing circuitry generates a display image indicating the difference between the estimation data and the second imaged data. The display displays the display image.

Abstract: According to one embodiment, a magnetic resonance imaging apparatus includes a data acquisition unit and an image generation unit. The data acquisition unit is configured to acquire magnetic resonance signals from an object in a data acquisition order having a first regularity and a data acquisition order having a second regularity different from the first regularity. The magnetic resonance signals correspond to a sampling region asymmetric in a wave number direction in a k-space. The image generation unit is configured to generate magnetic resonance image data by data processing including image reconstruction processing based on the magnetic resonance signals and a signal filling to a non-sampling region using a phase conjugate symmetry in the k-space.

Abstract: A magnetic resonance imaging apparatus according to an embodiment includes an execution unit and a generation unit. The execution unit executes first data collection of collecting a data after a predetermined inversion time elapses from a timing in which a labeling pulse is applied to a fluid flowing into an imaging region of a subject and a second data collection of collecting a data without the application of the labeling pulse. The generation unit generates a differential image by using the first data collected by the first data collection and the second data collected by the second data collection. Here, the generation unit generates the differential image by a different differential method according to a relation between the inversion time and a longitudinal relaxation time of the fluid.

Abstract: A magnetic resonance imaging apparatus according to an embodiment includes a sequence controller and a storage unit. The sequence controller acquires magnetic resonance signals of a target imaging part including cerebrospinal fluid flowing therein of a subject in a condition where a supply of oxygen is receivable, at a plurality of time phases in an oxygen inhalation process of the subject. The storage unit stores therein the magnetic resonance signals acquired at the time phases.