Dear Health Provider - the @readimask worn by the person who showed you that QR code (or this tweet) has no metal parts in it, and can safely be worn during an MRI.
So, Dr. Duchin and I were/are having a good conversation about #CoVidIsAirborne, and what was necessary as far as to move this forward. @kprather88 had retweeted it, and so was reading the conversation.