Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The cardiomediastinal silhouette is unremarkable . Pulmonary fibrosis is worse in the right upper lung fields with architectural distortion . No focal pulmonary opacity concerning for pneumonia is seen . Blunting at the left costophrenic angle seen the prior study , possibly representing a small effusion is significantly improved .
    OUTPUT:
    
No acute cardiopulmonary abnormality .