only after the network is optimized in this way can it correctly identify an unknown x. ray. but how accurate is artificial intelligence compared to a doctor s expertise. we have actually done this test twice of this point once with a set of studies. and i state a set that we had a radiologist label and then we compare the accuracy of the model to the radiologists and we found that they were very similar in terms of accuracy on most pathologies on one of them the model was performing the radiologist not the radiologist where on the model and then we repeated the experiment this time using a dataset from stanford which we recently released which is 200000 chest x. rays and then we had a similar set up where we had subspecialty radiologists these are very uncommon