Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Lung volumes are low , with crowding of bronchovascular markings , but no focal consolidation . The cardiomediastinal and hilar contours are normal . There are no pleural effusions or pneumothorax . Mild multilevel degenerative changes in the thoracic spine .
    OUTPUT:
    
Low lung volumes , without acute process .