Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral views of the chest were obtained . No focal consolidation , pleural effusion , or evidence of pneumothorax is seen . The cardiac and mediastinal silhouettes are stable with substantial widening of the mediastinum , presumed due to tortuous aorta . However , on this study , a dilated ascending aorta would not be excluded ; however , findings are stable as compared to the prior study .
    OUTPUT:
    
No acute cardiopulmonary process . No significant interval change . Persistent widening of the mediastinum which may be related to a dilated tortuous aorta which can be further evaluated on CT .