Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Cardiac silhouette size remains mild to moderately enlarged , unchanged . The aorta is markedly tortuous , as seen previously . Mediastinal and hilar contours are unchanged . Lungs are hyperinflated . Minimal streaky retrocardiac opacity likely reflects atelectasis , without focal consolidation . Pulmonary vasculature is not engorged . Minimal blunting of the left costophrenic sulcus may reflect a trace pleural effusion . No right pleural effusion or pneumothorax is present . No acute osseous abnormality is detected .
    OUTPUT:
    
Streaky retrocardiac atelectasis . Possible trace left pleural effusion .