Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Cardiac , mediastinal and hilar contours are normal . Pulmonary vasculature is normal . Lung volumes are low , but the lungs are clear without focal consolidation . No pleural effusion or pneumothorax is present . No acute osseous abnormality is visualized . No subdiaphragmatic free air is visualized .
    OUTPUT:
    
No acute cardiopulmonary abnormality .