Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral views of the chest provided . Mild atelectasis in the left lower lobe is new . No pleural effusion or pneumothorax . Hilar and cardiomediastinal contours are normal . A VP shunt is partially visualized .
    OUTPUT:
    
Mild atelectasis in the left lower lobe is new . No pneumonia .