Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral views of the chest demonstrate low lung volumes , which accentuate bronchovascular markings . There is no focal consolidation , pleural effusion or pneumothorax . Convex lateral contour to the right suprcardiac mediastium , stable since ___ , is most likely due to an ascending aorta that is chronically tortuous and / or dilated . Heart size is mildly enlarged , but also stable . The imaged upper abdomen is unremarkable .
    OUTPUT:
    
No evidence of acute cardiopulmonary process . Mild chronic cardiomegaly and tortuous or dilated ascending thoracic aorta .