Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: As compared to the prior examination there has been no relevant interval change . Blunting of the right costophrenic angle may represent chronic pleural thickening or a tiny effusion . There is no evidence of focal consolidation , pneumothorax , or pulmonary edema . The cardiomediastinal silhouette is unchanged .
    OUTPUT:
    
No evidence of focal pneumonia .