Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral radiographs of the chest demonstrate clear lungs with no acute infiltrate . The hila are not enlarged compared to prior radiograph , and the mediastinal and cardiac contours are normal . Chronically elevated left hemidiaphragm is noted all the way back to ___ . No pleural effusion or pneumothorax is seen .
    OUTPUT:
    
No evidence of acute infiltrate or hilar lymphadenopathy .