Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Cardiomediastinal silhouette is stable . Again heart size is top - normal with mild unfolding of the thoracic aorta . Hila are contours are unremarkable . Trace atelectasis is noted at the right lung base and lingula . Lungs are otherwise clear . Pleural surfaces are clear without effusion or pneumothorax .
    OUTPUT:
    
No acute cardiopulmonary abnormality .