Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral chest radiographs . Left lower lobe atelectasis and elevation of the left hemidiaphragm is not significantly changed from ___ . Pleural thickening along the left costal margin is thickened and a small residual effusion is likely . There is no pneumothorax and the right lung is clear . The cardiomediastinal silhouette is normal . Multiple posterior rib fractures on the left shows some evidence of healing .
    OUTPUT:
    
No pneumothorax or large pleural effusion .