Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral radiographs of the chest demonstrate normal heart size mediastinal and hilar contours . No focal consolidation , pleural effusion or pneumothorax . Mild intersitial abnormality in the lower lobes . Mild S - shaped scoliosis of the thoracic spine .
    OUTPUT:
    
No focal consolidation . Mild interstial abnormality in the lower lobes could represent viral pneumonia or chronic changes . Change from preliminary read of " No pneumonia " emailed to the ED ___ nurse on ___ .