Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The heart size is mildly enlarged but unchanged . The mediastinal and hilar contours are within normal limits . Minimal streaky opacity in the retrocardiac region likely reflects atelectasis . No focal consolidation , pleural effusion or pneumothorax is present . No frank pulmonary edema is demonstrated , though there is mild prominence of the pulmonary vascularity that could reflect minimal congestion , relatively similar compared to the prior exam . No acute osseous abnormalities are detected .
    OUTPUT:
    
Left basilar atelectasis . Mild pulmonary vascular congestion , not significantly changed compared to the prior exam .