One Chest X-Ray, Several Readings: Checking an AI Chest X-Ray Result Against the X-Ray Machine's Own Processing Settings

An AI program reads a chest X-ray and gives a score, for example for tuberculosis. Today we see one score from one picture. This note describes a simple check that can sit on top of any such program. The person is X-rayed once. From the raw image that the machine holds for that one exposure, several pictures are made by changing only the X-ray machine's own image-processing settings, within the range the maker permits. The AI reads every picture. If the scores stay together, the X-ray supports the score firmly. If they spread out, the score depends on a processing setting and deserves a closer look. Other methods shake the picture with invented changes, such as flips, rotations or artificial noise. This method uses the settings the X-ray machine itself allows, so the uncertainty it measures is real, and it is read for each person's own X-ray. One number, the spread value, tells which case it is. A computer-decided shunting action then moves the X-ray that needs care to the front of the reading list, while all other X-rays carry on. The words used stay calm. It needs no second X-ray, no extra radiation and no new device, and the AI program is not changed. Patent pending.