Multi-Channel SQUID Magnetospinogram System With Closed-Cycle Helium Recondensing

We developed a magnetospinogram (MSG) system equipped with a closed-cycle helium recondensing unit. The MSG system detects weak magnetic fields evoked by neural activity of spinal cords using superconducting quantum interference devices (SQUIDs) and provides functional images effective for the diagnosis of spinal cord diseases. Thus far, the cost of liquid helium (LHe) required to maintain the sup...