Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lungs are clear besides linear left basilar opacity which is likely atelectasis versus scarring , . There is no focal consolidation or effusion . The cardiomediastinal silhouette is stable . Tortuosity of the descending thoracic aorta is again noted . No acute osseous abnormalities , degenerative changes seen at the acromioclavicular joints . Median sternotomy wires are noted .
    OUTPUT:
    
No acute cardiopulmonary process .