Abstract: An MRI apparatus includes a scanner configured to apply an RF pulse to an object and processing circuity configured to: set a first pulse sequence in which acquisition of a first set of MR signals is started after a first delay time from application of a first excitation pulse, and a second pulse sequence in which acquisition of a second set of MR signals is started after a second delay time from application of a second excitation pulse, the second delay time being different from the first delay time; acquire first and second sets of MR signals by causing the scanner to apply the first and second pulse sequences to the object; generate a combined dataset by averaging a first dataset based on the first set of MR signals and a second dataset based on the second set of MR signals; and reconstruct an MR image based on the combined dataset.

Abstract: According to one embodiment, a magnetic resonance imaging apparatus includes processing circuitry. The processing circuitry sets imaging parameters for each scan. The processing circuitry specifies the size of the object region in the phase encode direction from a first image. The first image acquired by using a pulse sequence different from EPI. The processing circuitry sets parameters in a field of view in the phase encode direction in a phase correction scan based on the specified size and the size of the field of view in the phase encode direction in a second scan. The phase correction scan is executed for acquiring phase correction information for the first image. The second scan is executed for acquiring a second image by using EPI.

Abstract: A magnetic resonance imaging apparatus according to an embodiment includes a temperature sensor and a processing circuit. The temperature sensor acquires a temperature. The processing circuit calculates, based on information on an imaging sequence in which magnetic resonance imaging is to be performed, an estimated value of consumption energy of a gradient coil in a case when the imaging sequence is executed and calculates, based on the temperature acquired by the temperature sensor and the estimated value of the consumption energy, an estimated value of a temperature of the gradient coil, the temperature of the gradient coil undergoing changes as the imaging sequence is executed.

Abstract: A magnetic-resonance imaging apparatus of an embodiment includes a gradient coil, a transmitter coil, and a processing circuitry. The gradient coil applies a gradient magnetic field to an imaging space in which a subject is placed. The transmitter coil applies a RF (radio frequency) pulse to the imaging space. The processing circuitry calculates a target temperature of the gradient coil throughout multiple protocols to be executed in an examination of the subject, and controls a temperature of the gradient coil to approach the target temperature when a data used to set a center frequency of the RF pulse is measured.

Abstract: A magnetic resonance imaging apparatus according to an embodiment includes sequence controlling circuitry and processing circuitry. The sequence controlling circuitry acquires first k-space data in units of a plurality of segments while arranging the plurality of segments to overlap one another in a read-out direction, the first k-space being divided into the plurality of segments in the read-out direction. The processing circuitry calculates a weighting coefficient on a basis of information about a gradient magnetic field related to the acquisition and generates second k-space data on a basis of the plurality of segments in the first k-space data and the weighting coefficient.

Abstract: A magnetic resonance imaging apparatus includes sequence controlling circuitry and processing circuitry. When executing a pulse sequence on a plurality of slices by which an inversion recovery pulse to invert longitudinal magnetization of a tissue between a positive value and a negative value is applied to a predetermined one of the slices, and when a standby time period has elapsed a data acquisition is subsequently performed on the predetermined slice, the sequence controlling circuitry exercises control so that the inversion recovery pulse is applied to another one of the slices during the standby time period and so that a data acquisition is performed multiple times on each of the slices while varying the standby time period. The processing circuitry generates an image by using data acquired by the data acquisitions. The sequence controlling circuitry exercises control so that time intervals between the inversion recovery pulses are constant.

Abstract: According to one embodiment, a magnetic resonance imaging apparatus includes processing circuitry. The processing circuitry sets imaging parameters for each scan. The processing circuitry specifies the size of the object region in the phase encode direction from a first image. The first image acquired by using a pulse sequence different from EPI. The processing circuitry sets parameters in a field of view in the phase encode direction in a phase correction scan based on the specified size and the size of the field of view in the phase encode direction in a second scan. The phase correction scan is executed for acquiring phase correction information for the first image. The second scan is executed for acquiring a second image by using EPI.

Abstract: A magnetic-resonance imaging apparatus of an embodiment includes a gradient coil, a transmitter coil, and a processing circuitry. The gradient coil applies a gradient magnetic field to an imaging space in which a subject is placed. The transmitter coil applies a RF (radio frequency) pulse to the imaging space. The processing circuitry calculates a target temperature of the gradient coil throughout multiple protocols to be executed in an examination of the subject, and controls a temperature of the gradient coil to approach the target temperature when a data used to set a center frequency of the RF pulse is measured.

Abstract: A magnetic resonance imaging apparatus according to an embodiment includes a temperature sensor and a processing circuit. The temperature sensor acquires a temperature. The processing circuit calculates, based on information on an imaging sequence in which magnetic resonance imaging is to be performed, an estimated value of consumption energy of a gradient coil in a case when the imaging sequence is executed and calculates, based on the temperature acquired by the temperature sensor and the estimated value of the consumption energy, an estimated value of a temperature of the gradient coil, the temperature of the gradient coil undergoing changes as the imaging sequence is executed.