Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: AP portable semi upright view of the chest . Tracheostomy projects over the superior mediastinum . The lungs are clear and hyperinflated . No focal consolidation , large effusion or pneumothorax seen . Cardiomediastinal silhouette appears normal . No acute bony injuries .
    OUTPUT:
    
No acute findings . No evidence of pneumonia .