Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lungs are gross plane clear . The mediastinum appears widened likely due to unfolding of the aorta . The cardiac silhouette is normal . There is no pleural effusion or pneumothorax . Atherosclerotic calcifications of the aortic arch is noted . Degenerative changes are seen at the bilateral acromioclavicular joints . s
    OUTPUT:
    
No evidence of acute pulmonary process . No definite pneumonic infiltrate .