Magnetic resonance imaging device
A magnetic resonance imaging device according to an embodiment includes a gradient amplifier, a battery, a detector, and a battery controller. The gradient amplifier supplies electric power to the gradient coil. The battery is charged with electric power that is supplied from the power supply. The detector detects a high power output request on the gradient amplifier. The battery controller controls to supply electric power charged in the battery in addition to electric power supplied from the power supply to the gradient amplifier when the high power output request is detected.
1. A magnetic resonance imaging device comprising:
a gradient amplifier configured to supply electric power to a gradient coil;
a battery configured to be charged with electric power that is supplied from a power supply;
a detector configured to detect a high power output request on the gradient amplifier; and
a battery controller configured to control to supply electric power charged in the battery in addition to electric power supplied from the power supply to the gradient amplifier when the high power output request is detected.
2. The magnetic resonance imaging device according to claim 1 , wherein
the gradient amplifier includes a power supply input unit configured to control input of electric power that is supplied from the power supply, and
the battery is included in the power supply input unit.
3. The magnetic resonance imaging device according to claim 1 , wherein the detector is configured to detect the high power output request based on an imaging condition.
4. The magnetic resonance imaging device according to claim 3 , wherein the detector is configured to calculate electric power that is requested on the gradient amplifier for every unit time based on pulse sequence information defined by the imaging condition and detect the high power output request from the calculated electric power.
5. The magnetic resonance imaging device according to claim 1 , further comprising an imaging controller configured to control so as not to start imaging when a plurality of pulse sequences requesting high power output are specified on an imaging design.
6. The magnetic resonance imaging device according to claim 1 , further comprising an imaging controller configured to control to change an execution order of pulse sequences when a plurality of pulse sequences requesting high power output are specified on an imaging design.
7. The magnetic resonance imaging device according to claim 1 , wherein the detector is configured to monitor output power or output current of the power supply and detect the high power output request when the output power or the output current reaches a certain threshold.
8. The magnetic resonance imaging device according to claim 1 , wherein the detector is configured to monitor an output voltage of a converter arranged between the power supply and the gradient amplifier and detect the high power output request when the output voltage reaches a certain threshold.
9. The magnetic resonance imaging device according to claim 1 , further comprising a capacitor configured to be charged with electric power that is supplied from the power supply or the battery, in addition to the battery, wherein
the battery controller is configured to control to supply electric power charged in the capacitor to the gradient amplifier when the high power output request is detected.
10. The magnetic resonance imaging device according to claim 9 , wherein the electric power charged in the capacitor is supplied to the gradient amplifier at at least a rising time when a waveform of a pulse output from the gradient amplifier is a waveform with a large inclination.