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I looked around last week to see if they are on the market yet, and found that Philips already seems to have helium-free MRIs for sale. I'm not sure if they just sealed it better or switched to REBCO.

edit: nvm, finally found more info. it's just better sealed helium https://www.usa.philips.com/healthcare/resources/landing/the...

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My understanding is that most of the experiments for NMR with REBCO at this point are geared towards high field NMR (like 30T) whereas medical NMR field strength is down around 1-3T.

I don’t know what the cost delta is between LTS and HTS magnets, but I imagine the much broader applicability of HTS will bring manufacturing costs way down with economies of scale.

In the interim, people are still trying to figure out effective ways to joint the HTS sections.

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