Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral chest radiograph demonstrates mildly hyperinflated lungs . Bibasilar atelectasis is noted . No pleural effusion or pneumothorax . Heart size , mediastinal contour , and hila are unremarkable . Limited assessment of the upper abdomen is unremarkable .
    OUTPUT:
    
No evidence of pneumonia .