Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There is widening of the superior mediastinum , though this may be due to low lung volumes and portable technique . Otherwise the lungs are clear with no evidence of a consolidation , effusion or pneumothorax . Cardiac silhouette is within normal limits . No acute fractures are identified .
    OUTPUT:
    
Widening of the superior mediastium which may be due to low lung volumes and portable technique . However , if there is concern for aortic dissection or aneurysmal dilatation , a dedicated Chest CTA is recommended for further evaluation . These findings were discussed by Dr . ___ with Dr . ___ ___ telephone at 12 :35 pm .