Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Supine portable chest x-rays . Relative lucency in the left hemithorax and right lung base is compatible with extensive bullous disease seen in the chest on prior chest CT from ___ . There is no new confluent consolidation . The cardiomediastinal silhouette is stable . No acute osseous abnormality is identified .
    OUTPUT:
    
No definite acute cardiopulmonary process .