Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Low lung volumes are present . Heart size is top normal . The aorta remains tortuous with atherosclerotic calcifications noted at the aortic knob . Small hiatal hernia is demonstrated . Crowding of bronchovascular structures is present without pulmonary edema . Hilar contours are within normal limits . Lungs are clear without focal consolidation . No pleural effusion or pneumothorax is seen . Moderate degenerative changes are noted in the thoracic spine .
    OUTPUT:
    
Low lung volumes without acute cardiopulmonary abnormality . Small hiatal hernia .