JP2005237417A5 - - Google Patents

Claims (10)

A pair of cryostats having a liquid refrigerant container with a superconducting coil incorporated therein, a superconducting magnet disposed vertically opposite to each other with the imaging space in which the subject is disposed, and the superconducting coil maintained at a superconducting temperature condensing liquid refrigerant to the means for connecting the upper and lower liquid cryogen vessels to inject beneath the liquid refrigerant container from above the liquid refrigerant container, the cryostat in placed again liquid gas the liquid refrigerant is vaporized A superconducting magnet device comprising cooling means for
It said connecting means, a superconducting magnet apparatus characterized by open end of the upper and lower is connected from the upper end surface of the superconducting coils disposed in the liquid refrigerant container of the upper and lower respective upper positions. 2. The superconducting magnet device according to claim 1, wherein the cryostat has an annular shape having a through hole at a central portion thereof.   3. The magnetic resonance imaging apparatus according to claim 1, wherein a capacity of the lower liquid refrigerant container is smaller than a capacity of the upper liquid refrigerant container. 4. A superconducting magnet apparatus according to claim 3, the vertical length of the lower liquid refrigerant container, a superconducting magnet apparatus characterized by not shorter than the vertical length of the upper liquid cryogen vessel. A superconducting magnet apparatus according to claim 3, a superconducting magnet apparatus characterized by recesses in the bottom surface of the lower liquid coolant container is formed. A superconducting magnet apparatus according to claim 1 or 2, wherein the lower liquid refrigerant container, a superconducting magnet apparatus characterized by being have at least one gas reservoir therein. The superconducting magnet device according to any one of claims 1 to 6, wherein at least means for measuring the liquid amount of the liquid refrigerant is displayed in the upper liquid refrigerant container, and the measurement result of the liquid amount of the liquid refrigerant is displayed. A superconducting magnet device comprising display means for performing the above operation . 8. The superconducting magnet apparatus according to claim 7, wherein the cooling means includes a monitoring means for its operating state and a timer means for integrating the operating time, and at least the upper liquid refrigerant container includes a pressure sensor therein, and the display means. Displays at least one of the output value of the monitoring means, the timer, and the pressure sensor and their change values. 9. The superconducting magnet device according to claim 8, wherein the monitoring information of the cooling means, the liquid amount of the liquid refrigerant, the internal pressure of the liquid refrigerant container, each measured value of the timer, or a change value thereof exceeds a preset threshold value. superconducting magnet apparatus characterized by comprising means for transmitting to a remote location and means for issuing an alarm when the said alarm and said measured value or change value.   A magnetic resonance imaging apparatus comprising the superconducting magnet device according to claim 1.