Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lungs are well expanded and clear . No pleural abnormality is seen . The heart size is normal . The mediastinal and hilar contours are unremarkable . Homogeneous opacity obscuring the right heart border is likely pericardial fat .
    OUTPUT:
    
No acute cardiopulmonary abnormality . No pneumothorax .