This was an IRB-approved, retrospective study using deidentified HIPAA-compliant images obtained from our Picture Archive and Communication System (PACS). Using a search engine that leverages the PACS’s API, multiple sets of images were obtained for this study. This included (a) 300 unique single frontal radiographs that indicated either presence (n = 150) or absence of an endotracheal tube (n = 150), (b) 300 radiographs indicating a low (n = 150) or satisfactory position (n = 150) of an endotracheal tube, and (c) 120 radiographs consisting of normal chest (n = 60) and normal abdominal radiographs (n = 60).