Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The cardiac , mediastinal and hilar contours appear within normal limits . The lung volumes are low and the right hemidiaphragm is moderately elevated compared to the left . This appears substantial and may be due to an eventration of the right hemidiaphragm , enlarged liver or phrenic nerve paralysis . The lungs appear clear aside from streaky right basilar opacity associated with the elevated hemidiaphragm on the right . There is no pleural effusion or pneumothorax .
    OUTPUT:
    
No evidence of acute disease . Elevation of the right hemidiaphragm .