Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Cardiac silhouette size is normal . The aorta is mildly tortuous . The mediastinal and hilar contours are unremarkable . Pulmonary vasculature is not engorged . Mild emphysematous changes are present without focal consolidation , pleural effusion or pneumothorax . Multiple bilateral rib fractures are noted , more so on the right left , better seen on the previous CT .
    OUTPUT:
    
No pneumothorax . Bilateral rib fractures are better appreciated on the recent CT torso exam .