Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The heart size is within normal limits . The mediastinal and hilar contours are normal and unchanged from prior exam . The lungs are clear . There is no large pleural effusion or pneumothorax . Again clips are seen in the left axillary region . Asymmetric breast tissue may represent prior surgery .
    OUTPUT:
    
No acute cardiopulmonary process .