Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The cardiac , mediastinal and hilar contours are normal . Pulmonary vascularity is normal and the lungs are clear . The extreme left costophrenic angle , however , is excluded from the field of view . There is no large pleural effusion or pneumothorax . No acute osseous abnormality is visualized .
    OUTPUT:
    
No acute cardiopulmonary abnormality .