3 ms·
As said previously, they used to use these, but having an induction loop means you can never have an MRI as this would superheat the coil. I'd rather have the o
by stuartbman 8y ago
As said previously, they used to use these, but having an induction loop means you can never have an MRI as this would superheat the coil. I'd rather have the option of an MRI should I need it, and a daycase procedure to change my batteries.
- jmole 8y agoYou could use capacitive power transfer with a nonmagnetic electrode.
- stuartbman 8y agoHappy to be corrected as I'm not an MR physicist, but I understand the problem is with any coils in the electronics rather than ferrous material.
- FPGAhacker 8y agoYes, magnetic flux induces a current in metal. It does not have to be ferrous. Drop a magnet down through a copper or aluminum tube for a demonstration of the effect. (The induced current creates a magnetic field that opposes the magnet, slowing the fall.)
- amluto 8y agoI’m not sure I see the problem. If the pacemaker kept the coil shorted except when charging, then even a fairly large AC field shouldn’t transfer much power or induce a problematic voltage. And an MRI is mostly a DC field, which seems mostly harmless.
- deleted 8y ago[deleted]
- kgc 8y agoShorted, it would still create heat.
- londons_explore 8y agoThe AC fields in an MRI aren't that large. You also don't have to short it. Leaving it open circuit with a charging circuit that can withstand large voltages is a much better bet.