Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The heart is mild to moderately enlarged . There is mild unfolding of the thoracic aorta . There is perihilar fullness bilaterally with indistinct central pulmonary vascularity suggesting pulmonary vascular congestion or fluid overload . In addition , within the right lower lung , there is a potential focal developing opacity , so coinciding pneumonia could be considered . There is no definite pleural effusion or pneumothorax .
    OUTPUT:
    
Findings suggesting mild - to - moderate vascular congestion with a potential developing focal opacity in the right lower lung , possibly pneumonia in the right lower lobe in the appropriate clinical setting ( although atelectasis could also be considered ) .