Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Lung volumes are low , with crowding of bronchovascular markings . Linear scar persists in the lingula . There is no focal consolidation . Heart size is top normal . Aorta is tortuous and unfolded . There are no pleural effusions or pneumothorax . Mild degenerative changes in the thoracic spine .
    OUTPUT:
    
Low lung volumes . No acute process .