MRI$BE15n:n6H$N0BA4@-$K$D$$$F(J
Safety on shutting down a superconducting MRI system
$Bu#2CF#!!?r(JA,$B0BA4@-8!F$0Q0w2q(JB
$B868&(JA,$B!JB
$B9qFb$K$O?t@iBf$N0eNEMQ(JMRI$B$,2TF/$7$F$$$k!#0lJ}!"G/4V(J100$BBf$rD6$($k(JMRI$B$,E15n$5$l!"?75! $B0BA4(J,$BD6EEF3(JMRI,$B1UBN%X%j%&%`(J,,,