Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Fibrotic changes in the lungs bilaterally are similar in distribution and appearance when compared to prior , particularly from ___ . There is no definite new consolidation although subtle changes could easily be obscured . There is no effusion or pneumothorax . The cardiomediastinal silhouette is within normal limits . Tortuosity of the descending thoracic aorta is noted . No acute osseous abnormalities .
    OUTPUT:
    
Chronic fibrotic changes in the lungs bilaterally . No definite superimposed acute process although one could easily be obscured .