| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a superconductive magnet apparatus which can effectively suppress the expansion of a region of a leakage magnetic field even in quench process, and to provide a magnetic resonance imaging apparatus and a nuclear magnetic resonance apparatus. <P>SOLUTION: The superconductive magnetic apparatus coaxially includes a plurality of superconductive coils 10, 11, 12, 20 which are annularly formed around the center axis Z passing through the center O in an imaging region F, and a conductor ring 40. The conductor ring 40 further includes a switch 50 which has an open portion electrically opened and can electrically switch the open portion into connection or disconnection, and a control means 52 for controlling the changeover of the switch 50. <P>COPYRIGHT: (C)2013,JPO&INPIT |
