Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral views of the chest were obtained . Streaky basilar retrocardiac opacity seen on the lateral view , may be overlying the right lung base on the frontal view , could be due to atelectasis but infection is not excluded in the appropriate clinical setting . No pleural effusion or pneumothorax is seen . The cardiac and mediastinal silhouettes are unremarkable .
    OUTPUT:
    
Streaky basilar retrocardiac opacities may be due to atelectasis , but infection is not excluded in the appropriate clinical setting .