Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral views of the chest demonstrate low lung volumes , which accentuate bronchovascular markings . Ascending aorta may be dilated . Mild perihilar vascular congestion is noted . There is no pneumothorax . Cholecystectomy clips project over right upper abdomen .
    OUTPUT:
    
Low lung volumes . Possible ascending aorta dilatation .