Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral chest radiographs were obtained . Cardiomediastinal silhouette is unchanged compared to the prior study . Previosuly seen opacity in the left lower lobe is improved ; however , there are persistent areas of opacification within the right mid and lower lobes , likely from atelectasis . No significant pleural effusions and no pneumothorax . Clips are again noted over the mediastinum .
    OUTPUT:
    
No significant changes compared to the prior study .