Radiology Partners petitions FDA for greater clarity around imaging AI regulations

Ah, marvellous. Radiology Partners, one of the great American radiology groups, has filed a petition begging the FDA for greater clarity on how vision language models in medical imaging are to be regulated. This is the regulatory equivalent of asking a building inspector to confirm whether the floor you are standing on is load-bearing — just as you have already moved the furniture in and started a family. The petition's call for 'greater clarity' is healthcare's most honest confession yet: we are deploying these things and we have absolutely no idea which box the paperwork belongs in.

The comedy writes itself. A vision language model looks at a scan and produces a report, which makes it either a medical device, a clinical decision-support tool, a triage aid, or, in the FDA's current taxonomy, a rather chatty PDF. Radiology Partners wants a clear lane; the FDA, in its infinite wisdom, prefers to issue a 200-page guidance document and a firm suggestion to attend a workshop. In the vacuum, hospitals will continue to "validate" their own algorithms with local datasets and a hopeful shrug, because nothing better is on offer. This is not a bug in the system; it is the system's most advertised feature.

But the truly delicious part is that the petition is a market admission as much as a regulatory request. Radiology Partners is effectively telling the FDA: we are already using these models, please tell us how not to be the cautionary tale. Nobody wants to be the first to receive a clearance because that sets the precedent, and nobody wants to be the first to get sued because that sets the ceiling. So the safest corporate move is a carefully-worded letter asking someone else to make the rules first. One can only assume the FDA will respond in three to five years, by which time the vision language model in question will have been retrained on an entirely new corpus and the whole question will be as current as a fax machine in a telemedicine consultation. Lovely.