Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Heart size is normal . Mediastinal and hilar contours are unremarkable . Scarring within the lung apices is symmetric . Pulmonary vasculature is normal . Lungs are clear . No pleural effusion or pneumothorax is identified . Rounded opacity projecting over the posterior left hemidiaphragm on the lateral view could reflect a small diaphragmatic hernia . No acute osseous abnormalities identified .
    OUTPUT:
    
No acute cardiopulmonary abnormality .