Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral views of the chest were obtained . There is right basilar opacity in relative linear configuration , most likely representing atelectasis or scarring , although infectious process is not excluded in the appropriate clinical setting . Left lung is clear . No pleural effusion or pneumothorax is seen . Cardiac and mediastinal silhouettes are unremarkable .
    OUTPUT:
    
Right basilar opacity in a relatively linear configuration may be due to atelectasis , although underlying infection is not excluded .