Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral views of the chest were obtained . Subtle patchy right basilar opacity may be due to atelectasis although a mild / early infectious process is not excluded in the appropriate clinical setting . The left lung is clear . There is no pleural effusion or pneumothorax . The cardiac and mediastinal silhouettes are stable and unremarkable .
    OUTPUT:
    
Right basilar opacity is slightly more conspicuous as compared to the prior study most likely due to atelectasis , although an early infection is not excluded in the appropriate clinical setting .