Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The heart is normal in size . The mediastinal and hilar contours appear within normal limits . The lungs appear clear . Posterior basilar opacity not apparent on the frontal view appears very similar to the prior examinations , so there is no evidence for an acute process . A remodeled left clavicle fracture appears old .
    OUTPUT:
    
No definite evidence of acute cardiopulmonary process .