Figure 7
From: Computer aided detection of tuberculosis on chest radiographs: An evaluation of the CAD4TB v6 system
Cases where radiograph presentation does not conform with Xpert result, making prediction by radiograph alone difficult for both observers and CAD4TB. The inset images show the CAD4TB heatmaps where blue indicates most normal texture and red indicates most abnormal. (a) An Xpert-negative case marked as TB positive (score 3) by all five observers and by CAD4TB v6 (score = 100). (b) An Xpert-positive case marked with score 1 (no-TB) by 4 of the experts and score 2 by the last one. The CAD4TB score for this case is 18.7 which is not picked up as TB positive until a sensitivity of 99% is reached.
