Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There is an S - shaped scoliosis . There is persistent blunting of the left hemidiaphragm , which could be related to atelectasis or scarring . The right lung is grossly clear . There is no large pleural effusion . There is no pneumothorax . Cardiomediastinal silhouette is stable .
    OUTPUT:
    
No evidence of pneumonia .