Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: AP upright and lateral views of the chest were provided . Since the prior exam , there is development of lower lung opacities which could represent pneumonia with associated pleural effusions , right greater than left . Mild pulmonary vascular congestion . The heart remains enlarged . There is a stent coursing through the entire descending thoracic aorta , unchanged . Midline sternotomy wires and mediastinal clips are again seen . The imaged osseous structures appear intact with a mild scoliosis again seen .
    OUTPUT:
    
Probable mild pulmonary edema with bilateral lower lobe opacities , which could represent an early pneumonia . Small bilateral effusions , right greater than left . Stable cardiomegaly and post-surgical changes in the descending thoracic aorta .