Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Accounting for differences in technique compared to the prior study , the cardiomediastinal and hilar contours are stable with unfolding the thoracic aorta . There is no pleural effusion or pneumothorax . Lungs are mildly underinflated but clear . Pulmonary vasculature is within normal limits .
    OUTPUT:
    
No acute cardiopulmonary process .