Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: A single - lead AICD remains in unchanged position . Severe cardiomegaly with tortuosity of the thoracic aorta with dense atherosclerotic calcifications is unchanged . Lung volumes are low causing crowding of bronchovascular structures . Lungs are otherwise clear . Pleural surfaces are clear without large effusion or pneumothorax .
    OUTPUT:
    
Low lung volumes without evidence of acute cardiopulmonary process .