Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lung volumes are lower than prior , resulting in crowding of the bronchovascular structures . There is no pleural effusion , pneumothorax or focal airspace consolidation . The cardiomediastinal contours are unchanged . Hilar structures are unremarkable .
    OUTPUT:
    
Lower lung volumes without an acute cardiopulmonary process .