Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral views of the chest provided . There is increased opacity overlying the spine on lateral projection , which is most likely due to positioning . Pulmonary vasculature is normal . Cardiomediastinal and hilar contours are normal . There are no pleural effusions . Prior thyroidectomy clips are noted . S - shaped scoliosis again seen .
    OUTPUT:
    
No evidence of pneumonia .