Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Portable single frontal chest radiograph was obtained . The lungs are fully expanded and clear . The heart size is normal . Widening of the right paratracheal stripe may reflect mediastinal adenopathy . There is no pleural effusion or pneumothorax .
    OUTPUT:
    
No pneumonia . Widening of the right paratracheal stripe may indicate mediastinal adenopathy . CT scan may be performed for further confirmation and diagnosis if clincially relevant .