Not just a research area! Recently on the DXMP mailing list someone was asking about QA procedures for their 0.064 tesla scanner. You can buy permanent magnets that strong without much trouble. I was very surprised since I wasn't aware they were in production — even searching Web results for "low-field MRI" in due diligence for this comment, I still only find papers and projections. Nonetheless, the Hyperfine Swoop exists, and you can buy it today:
Not just a research area! Recently on the DXMP mailing list someone was asking about QA procedures for their 0.064 tesla scanner. You can buy permanent magnets that strong without much trouble. I was very surprised since I wasn't aware they were in production — even searching Web results for "low-field MRI" in due diligence for this comment, I still only find papers and projections. Nonetheless, the Hyperfine Swoop exists, and you can buy it today:
https://hyperfine.io/