Abstract: According to one embodiment, a magnetic resonance imaging apparatus includes processing circuitry. The processing circuitry acquires a first resonance frequency distribution of a first tissue and a second resonance frequency distribution of a second tissue which is different from the first tissue. The processing circuitry calculates a center frequency of a frequency-selective pulse that suppresses or emphasizes either one of the first tissue and the second tissue in accordance with the first and second resonance frequency distributions. The processing circuitry collects a magnetic resonance signal after the frequency-selective pulse is applied at the calculated center frequency.

Abstract: According to one embodiment, a magnetic resonance imaging apparatus includes processing circuitry. The processing circuitry calculates a static magnetic field correction amount based on a static magnetic field distribution of a first imaging range narrower than a second imaging range. The processing circuitry collects a magnetic resonance (MR) image of the second imaging range under a static magnetic field which is corrected based on the static magnetic field correction amount. The processing circuitry corrects distortion of the collected MR image.

Abstract: An MRI apparatus includes imaging control circuitry that performs shimming imaging for collecting a first MR signal, and multi-slice imaging for collecting a second MR signal along with radiation of a non-region-selective prepulse, and processing circuitry that generates static magnetic field distributions of the slices, determines a first center frequency of an RF pulse corresponding to each slice and a second center frequency of the prepulse based on the static magnetic field distribution, and determines an order of slices for collecting the second MR signal in accordance with the first and/or second center frequencies, wherein the imaging control circuitry performs the multi-slice imaging in accordance with the order and the first and second center frequencies.

Abstract: A magnetic resonance imaging apparatus includes an interface, processing circuitry, and imaging control circuitry. The interface inputs, to a locator image, a position-indicating region indicating a position in a displayed cross section. The processing circuitry determines a collection direction relating to multi-slice imaging based on a static magnetic field distribution relating to the position-indicating region and the position-indicating region. The imaging control circuitry performs the multi-slice imaging in the collection direction to a plurality of slices in an imaging region which includes at least the position-indicating region.

Abstract: According to one embodiment, a magnetic resonance imaging apparatus installed in a shield room comprises a gantry, a table, and at least one unit. The gantry includes a static magnetic field magnet, a gradient magnetic field coil, and an RF coil. The subject is to be placed on the table. The at least one unit relates to control of the magnetic resonance imaging apparatus and is configured to include at least one opening on a upper surface on for maintenance and inspection.

Abstract: According to one embodiment, a magnetic resonance imaging apparatus includes processing circuitry. The processing circuitry calculates a static magnetic field correction amount based on a static magnetic field distribution of a first imaging range narrower than a second imaging range. The processing circuitry collects a magnetic resonance (MR) image of the second imaging range under a static magnetic field which is corrected based on the static magnetic field correction amount. The processing circuitry corrects distortion of the collected the MR image.

Abstract: According to one embodiment, a magnetic resonance imaging apparatus includes processing circuitry. The processing circuitry acquires a first resonance frequency distribution of a first tissue and a second resonance frequency distribution of a second tissue which is different from the first tissue. The processing circuitry calculates a center frequency of a frequency-selective pulse that suppresses or emphasizes either one of the first tissue and the second tissue in accordance with the first and second resonance frequency distributions. The processing circuitry collects a magnetic resonance signal after the frequency-selective pulse is applied at the calculated center frequency.

Abstract: According to one embodiment, an MRI apparatus includes imaging control circuitry that performs shimming imaging for collecting a first MR signal, and multi-slice imaging for collecting a second MR signal along with radiation of a non-region-selective prepulse, and processing circuitry that generates static magnetic field distributions of the slices, determines a first center frequency of an RF pulse corresponding to each slice and a second center frequency of the prepulse based on the static magnetic field distribution, and determines an order of slices for collecting the second MR signal in accordance with the first and/or second center frequencies, wherein the imaging control circuitry performs the multi-slice imaging in accordance with the order and the first and second center frequencies.

Abstract: According to one embodiment, a magnetic resonance imaging apparatus includes an interface, processing circuitry, and imaging control circuitry. The interface inputs, to a locator image, a position-indicating region indicating a position in a displayed cross section. The processing circuitry determines a collection direction relating to multi-slice imaging based on a static magnetic field distribution relating to the position-indicating region and said position-indicating region. The imaging control circuitry performs the multi-slice imaging in the collection direction to a plurality of slices in an imaging region which includes at least the position-indicating region.

Abstract: A magnetic-resonance imaging apparatus according to an embodiment includes processing circuitry. The processing circuitry registers a predetermined protocol set that is selected from among multiple protocol sets preset in a storage unit as a protocol set that is to be executed in an examination of a subject. The processing circuitry accepts an instruction indicating whether to include a check protocol to check an influence of fat suppression in the examination. When the instruction is accepted, the processing circuitry incorporates the check protocol in the protocol set to be executed.

Abstract: According to one embodiment, a magnetic resonance imaging apparatus installed in a shield room comprises a gantry, a table, and at least one unit. The gantry includes a static magnetic field magnet, a gradient magnetic field coil, and an RF coil. The subject is to be placed on the table. The at least one unit relates to control of the magnetic resonance imaging apparatus and is configured to include at least one opening on a upper surface on for maintenance and inspection.

Abstract: According to at least one of embodiments, a magnetic resonance imaging apparatus includes an RF coil equipped with a plurality of coil elements and processing circuitry configured to determine a risk of generating artifact caused by mixture of a magnetic resonance signal outside an imaging region of an object, based on imaging conditions and to select at least one coil element used for generating an image of the object from the plurality of coil elements, based on a result of determination of the risk of generating artifact.

Abstract: A magnetic resonance imaging apparatus according to an embodiment includes a collecting unit and an identifying unit. The collecting unit collects at least one frequency spectrum out of a plurality of frequency spectra by performing a pre-scan in which a first substance is frequency-selectively suppressed or enhanced. The identifying unit analyzes the frequency spectra and identifies a resonance frequency of a second substance on the basis of analysis results.

Abstract: An MRI (magnetic resonance imaging) apparatus includes a main scan executing unit for executing a main scan, an image reconstruction unit for reconstructing image data based on MR signals acquired in the main scan, a calibration scan setting unit, a calibration scan executing unit, and a condition determining unit. The calibration scan setting unit calculates a condition of a calibration scan for determining an imaging condition of the main scan or a condition of correction processing of the image data, based on a type of an RF coil device and an imaging part. The calibration scan executing unit executes the calibration scan based on the condition of the calibration scan. The condition determining unit determines the imaging condition of the main scan or the condition of the correction processing, based on an execution result of the calibration scan.

Abstract: A magnetic-resonance imaging apparatus according to an embodiment includes processing circuitry. The processing circuitry registers a predetermined protocol set that is selected from among multiple protocol sets preset in a storage unit as a protocol set that is to be executed in an examination of a subject. The processing circuitry accepts an instruction indicating whether to include a check protocol to check an influence of fat suppression in the examination. When the instruction is accepted, the processing circuitry incorporates the check protocol in the protocol set to be executed.

Abstract: A magnetic resonance imaging apparatus according to an embodiment includes a collecting unit and an indentifying unit. The collecting unit collects at least one frequency spectrum out of a plurality of frequency spectra by performing a pre-scan in which a first substance is frequency-selectively suppressed or enhanced. The indentifying unit analyzes the frequency spectra and identifies a resonance frequency of a second substance on the basis of analysis results.

Abstract: In one embodiment, an MRI apparatus (20) includes a main scan executing unit for executing a main scan, an image reconstruction unit (90) for reconstructing image data based on MR signals acquired in the main scan, a calibration scan setting unit (100), a calibration scan executing unit, and a condition determining unit. The calibration scan setting unit calculates a condition of a calibration scan for determining “an imaging condition of the main scan” or “a condition of correction processing of the image data”, based on a type of an RF coil device and an imaging part. The calibration scan executing unit executes the calibration scan based on the condition of the calibration scan. The condition determining unit determines “the imaging condition of the main scan” or “the condition of the correction processing”, based on an execution result of the calibration scan.