Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There is convexity of the mediastinal silhouette in the region of the ascending aorta , which could either be a tortuous or dilated aorta , more so than in ___ . The lungs are clear bilaterally . No pleural effusion or pneumothorax . Heart size is normal .
    OUTPUT:
    
No radiographic explanation for the patient 's cough and diffuse wheezing . There is convexity of the mediastinal silhouette in the region of the ascending aorta , which could either be a tortuous or dilated aorta , more so than in ___ . The either tortuous or dilated aorta should be evaluated clinically for any evidence of aortic pathology .