Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: A small right layering pleural effusion is unchanged . Bibasilar subsegmental atelectasis is present . Airspace opacification at the right lung base has slightly increased . There is no pneumothorax . The heart and mediastinum are within normal limits despite the projection .
    OUTPUT:
    
Stable small layering right pleural effusion with bibasilar subsegmental atelectasis . Infection at the right base can not be excluded in the appropriate clinical setting .