Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lung volumes are very low . The cardiac , mediastinal and hilar contours appear within normal limits . The posterior right hemidiaphragm is obscured on the lateral view , suggesting patchy but minor opacity , possibly with a trace pleural effusion .
    OUTPUT:
    
Suspicion for minor posterior right basilar opacity , not specific but possibly compatible with atelectasis ; trace pleural effusion is not excluded on the right .