Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The cardiomediastinal silhouette is stable and within normal limits . The hila are unremarkable . The lungs are clear without focal consolidation . There is no pulmonary vascular congestion or pulmonary edema . There is no pneumothorax or pleural effusion . Thoracic spine degenerative changes are stable . AC joint degenerative change is moderate to severe bilaterally .
    OUTPUT:
    
No acute cardiopulmonary process . Stable chest x-ray .