Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Lungs are clear without confluent consolidation . There is no pulmonary edema or pleural effusions . Cardiomediastinal and hilar contours are within normal limits . A known left fourth rib fracture shows interval healing . Degenerative changes of bilateral glenohumeral joints are again noted .
    OUTPUT:
    
No acute cardiopulmonary process . Interval healing of known left rib fracture .