Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The cardiomediastinal contours are within normal limits . The bilateral hila are unremarkable . The lungs are clear without focal consolidation . There is no evidence of pulmonary vascular congestion . There is no pneumothorax or pleural effusion . Multilevel thoracic spine degenerative changes are similar to prior exam .
    OUTPUT:
    
No acute cardiopulmonary process . No evidence of a displaced rib fracture .