Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Low lung volumes are noted . The heart size remains mildly enlarged . The mediastinal contour is stable with tortuosity of the thoracic aorta again noted . Widening of the right superior mediastinal contour is unchanged , and likely reflects tortuous vessels . Diffuse atherosclerotic calcifications of the thoracic aorta are present . There is crowding of the bronchovascular structures due to low inspiratory lung volumes . No pulmonary edema , focal consolidation , pleural effusion or pneumothorax is visualized .
    OUTPUT:
    
No acute cardiopulmonary abnormality . Low lung volumes .