Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: AP upright and lateral views of the chest were obtained . The heart is normal in size and cardiomediastinal contour including tortuosity of the thoracic aorta is unchanged . Linear bibasilar opacities are unchanged and likely represent mild atelectasis . There is no focal consolidation , pleural effusion or pneumothorax .
    OUTPUT:
    
No evidence of pneumonia .