Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Right atrial and ventricular pacemaker courses in expected position . There are no pleural effusions or pneumothorax . Lung volumes are decreased , with crowding of bronchovascular markings , but no focal consolidation . Heart size is top normal , with a left ventricular configuration . The aorta is tortuous and calcified . Again noted are multiple prominent colonic loops in the upper abdomen , but no evidence of free air .
    OUTPUT:
    
Low lung volumes , without acute cardiopulmonary process .