Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: All lines and tubes are unchanged in positioning . There is new complete left lower lobe collapse . The lungs are otherwise clear . The pulmonary vasculature is normal . The cardiomediastinal silhouette is stable . There is no pleural effusion . There is no pneumothorax .
    OUTPUT:
    
1 . Appropriate positioning of all lines and tubes . 2 . New complete left lower lobe collapse .