Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Bibasilar fibrotic changes are noted , better seen on patient 's prior CT chest examination . The lungs are well expanded without focal consolidation , pleural effusion , pneumothorax , or pulmonary edema . The cardiomediastinal silhouette is within normal limits .
    OUTPUT:
    
Chronic bibasilar fibrotic changes without acute cardiopulmonary process .