Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral chest radiographs were obtained . Appearance of the right hemithorax with calcifications of the pleura is unchanged . Rightward shift of the mediastinum is noted and appears unchanged . Post - surgical chains are noted in the left lung with residual mild - moderate pleural effusion . Opacities in the area of resection have improved . Cardiomediastinal silhouette is stable . No pneumothorax .
    OUTPUT:
    
Slight improvement in mild - moderate left pleural effusion .