Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The previously seen left pneumothorax has resolved . The lungs are otherwise well expanded and clear . The hila and pulmonary vasculature are normal . No pleural effusions . The cardiomediastinal silhouette is normal and unchanged . The left posterior eighth rib healing fracture is again seen .
    OUTPUT:
    
Interval resolution of pneumothorax . No other acute cardiopulmonary process .