Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The cardiomediastinal silhouettes are stable and within normal limits . The thoracic aorta is mildly tortuous . The bilateral hila are unremarkable . The lungs are clear . There is no evidence of pulmonary vascular congestion . There is no pneumothorax or pleural effusion . Compression deformity of a mid thoracic vertebral body and bilateral rib fractures are stable since prior exam from ___ .
    OUTPUT:
    
No acute cardiopulmonary process .