Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lungs are hyperinflated with mild flattening of the diaphragms , suggestive of emphysema . There is no focal consolidation , effusion , or pneumothorax . Mediastinal and hilar contours are normal . Heart size is normal . Coronary stents and aortic valvular calcifications are present , better assessed on prior CT from ___ .
    OUTPUT:
    
No acute intrathoracic process . Specifically , no evidence of intrathoracic malignancy .