Fig 2. Schematic of labeling and training process.

A Patient with or without PH receiving CXR screening (a). The same patient receiving TTE to identify PH by measuring PASP value with cutoff of 40 mmHg (b). Using retrospective CXR and corresponding PASP tags to train transfer learning models that can be deployed to diagnose PH and predict PASP according to the CXR of new patients (c). CXR, chest X-ray; TTE, transthoracic echocardiography; PH, pulmonary hypertension; PASP, pulmonary artery systolic pressure.