School ager with upper respiratory infection and decreased right breath sounds Pediatric Imaging Chest June 7, 2026March 19, 2026 CXR PA (left) shows a dense opacity in the middle of the right lung that obscures the right heart border which on the CXR lateral (right) is located over the heart. The diagnosis was bacterial pneumonia of the medial segment of the right middle lobe. Related Published June 7, 2026March 19, 2026