Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral views of the chest . The lung volumes are low , resulting in crowding of the bronchovascular structures . There is no pleural effusion , pneumothorax or focal airspace consolidation . The heart is mildly enlarged . There is prominence of the pulmonary arteries , which is stable . Calcifications are again seen within the aortic arch .
    OUTPUT:
    
Low lung volumes with persistent prominence of the pulmonary arteries .