Superconducting magnet device-monitoring system, method of monitoring superconducting magnet device and MRI device

A method of monitoring a superconducting magnet device, comprising:

• detecting a remaining amount of liquid helium, in which a superconducting coil is immersed, stored in a liquid helium container of the superconducting magnet device;
• calculating an estimated remaining amount, which shows an estimated value of the remaining amount, on the basis of a preliminarily detected remaining amount of liquid helium;
• and
• outputting monitoring information on a superconducting magnet device on the basis of a detected remaining amount and an estimated remaining amount of liquid helium.

An MRI device, comprising:

• a magnetostatic field coil that applies magnetostatic field to a subject;
• a superconducting magnet device-monitoring system that monitors the magnetostatic field coil;
• a gradient coil that applies gradient field to the subject, to which the magnetostatic field is already applied;
• an RF coil that receives nuclear magnetic resonance signals discharged from the subject;
• and
• a reconstruction unit that reconstructs a tomogram of the subject on the basis of the received nuclear magnetic resonance signal,
• wherein the superconducting magnet device-monitoring system includes a detecting unit that detects a remaining amount of liquid helium, in which a superconducting coil composing the magnetostatic field coil, is immersed, in a liquid helium container;
• a remaining amount estimating unit that calculates an estimated remaining amount on the basis of the remaining amount of liquid helium preliminarily detected by the detecting unit;
• and an output unit that outputs monitoring information on a superconducting magnet device on the basis of detected remaining amount and estimated remaining amount of liquid helium.