Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Relative elevation of the left hemidiaphragm is unchanged . Chain sutures project over the upper lungs bilaterally . Postthoracotomy changes are seen on the left . There is no focal lung consolidation . Cardiomediastinal silhouette is unchanged . There is no pneumothorax or pleural effusion . Severe emphysema is again noted .
    OUTPUT:
    
No acute process . No significant change compared to the most recent prior chest radiographs .