Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There are low lung volumes . The heart size is moderate to severely enlarged but unchanged . The mediastinal contours are stable . Focal opacity is noted within the right upper lung field . Additionally there is mild pulmonary vascular congestion . Streaky left basilar opacity could reflect atelectasis . No large pleural effusion or pneumothorax is identified . Left mid clavicular subacute fracture is partially obscured due to overlying catheter .
    OUTPUT:
    
Focal right upper lung field opacity concerning for pneumonia . Mild pulmonary vascular congestion . Probable left basilar atelectasis .