Canon Medical Systems Corporation

Takehiro Shibuya

Hitoshi Kanazawa

Seiji Nozaki

Sadanori Tomiha

Kazuto Nakabayashi

Hiromi Kawamoto

A static magnetic field magnet according to any of embodiments includes: a superconducting coil generating a static magnetic field; and a radiation shield surrounding the superconducting coil. In the static magnetic field magnet, at least a surface on a gradient coil side of the radiation shield includes a peripheral portion that forms multiple concavity and/or convexity. Further, In the static magnetic field magnet, a shape of a cross-section perpendicular to a depth direction of each of the multiple concavity and/or convexity formed by the peripheral portion is polygonal or circular. It is preferable that the peripheral portion is configured to form the multiple concavity and/or convexity in a straight line.

Static magnetic field magnet and MRI apparatus

According to one embodiment, a magnetic resonance imaging apparatus includes processing circuitry. The processing circuitry is configured to calculate an allowable amount of heat input to a superconducting magnet, the allowable amount being allocated to each of a plurality of imagings scheduled during a target period. The processing circuitry is configured to determine an imaging condition based on the allowable amount in the each of the plurality of imagings.

Magnetic resonance imaging apparatus and imaging management method

According to one embodiment, a MRI apparatus determines a first time during which a subsidiary power supply is capable of supplying power to a cooling device based on a capacity of the subsidiary power supply when power outage of a main power supply occurs, and determines a second time needed to demagnetize a superconducting magnet based on an excitation current of the superconducting magnet and a temperature of the superconducting magnet. The MRI apparatus determines starts ramp-down of the superconducting magnet after a third time based on the first time and the second time has elapsed from initiation of power outage of the main power supply.

Growing community of inventors

Nasushiobara, Japan

Takehiro Shibuya