Lens: a result worth its signature

Bangladesh has about four radiologists per million people, almost all in Dhaka, and a film taken in a district town can wait days for a read. Worse than the wait is the trust. The health directorate's 2022 crackdown closed over eleven hundred illegal facilities in its first days, and sector reporting describes reports printed over the names of physicians who never saw the image. The country has already seen what happens when reports lose credibility: during COVID, after a fake-certificate scandal, daily testing nearly halved because people stopped believing the results.

The regulator reached for the obvious fix with the only tool it had, ordering every facility to display a QR code on its signboard. That instinct, verification, was right. A sticker on a wall was not the way to deliver it.

Lens is the same spine, applied to the diagnostic report. A result leaves the center as a credential signed by the center and by the professional who verified it, landing in the patient's wallet with its reference ranges and its provenance intact. The report over a radiologist's name now requires that radiologist's actual key, so the ghost-signed report dies at a participating center. And because the model reads first and a licensed human signs last, the four-per-million specialist is multiplied rather than bypassed, exactly the boundary the model essays describe.

The QR sticker and the signed credential are after the same thing: a report you can trust without knowing the lab. The difference is that a sticker proves nothing and a signature proves the things that matter, who made this claim and whether it was altered. Lens is not a new trust mechanism invented for imaging. It is the prescription's signature, pointed at a lab result, so a report from a known chain finally weighs more than one off a roadside shop, and the difference travels with it.