Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral views of the chest were reviewed . The cardiomediastinal and hilar contours are normal . There is no pleural effusion or pneumothorax . Mild biapical thickening is stable . Hazy opacification at the right lung base is new , may reflect atelectasis or pneumonia in the correct clinical setting .
    OUTPUT:
    
Right basilar opacity could reflect atelectasis , but pneumonia is not excluded in the correct clinical setting .