Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Compared to the prior study , no significant change is detected . Possible minimal atelectasis / scarring at the right lung base is similar to the prior film . The lungs are otherwise grossly clear , without focal infiltrate , CHF , or effusion . The cardiomediastinal silhouette is stable .
    OUTPUT:
    
No evidence for acute pulmonary process . No significant change compared with ___ .