Fig. 2

Representative cases of true positive and false positive of the deep learning algorithm. True positive and false positive of the deep learning algorithm. a Plain radiograph of the lateral neck and the results of the deep learning algorithm showed a foreign body (arrows) over prevertebral soft tissue at C7 level partially obscured by the shoulder. b CT without contrast showed a foreign body over the cervical esophagus at C7 level and the photograph of the specimen retrieved revealed a flat rectangular shaped fish bone. c The deep learning algorithm misinterpreted the calcified postero-inferior lamina of the thyroid cartilage as a foreign body. This can be confidently recognized by identifying the two parallel lines conforming to the shape of the bilateral postero-inferior lamina of the thyroid cartilage