Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Lung volumes are low . The cardiac , mediastinal and hilar contours are normal . Pulmonary vascularity is normal . No focal consolidation , pleural effusion or pneumothorax is seen . There is minimal retrocardiac atelectasis . No acute osseous abnormalities present .
    OUTPUT:
    
Minimal retrocardiac atelectasis . No acute cardiopulmonary abnormality otherwise identified .