Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral radiographs of the chest were acquired . Lung volumes are low , causing exaggeration of the heart size and accentuation of the pulmonary vasculature . There is subsegmental bibasilar atelectasis . No focal consolidation is seen . The mediastinal contours are not significantly changed , with stable ectasia of the thoracic aorta . The heart size is normal . There are no pleural effusions . No pneumothorax is seen . No free air is seen under either hemidiaphragm .
    OUTPUT:
    
No acute cardiac or pulmonary process .