Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The cardiomediastinal and hilar contours are normal . The lungs are clear with the exception of some right basal atelectasis in response to a small right pleural effusion . The left lung and pleural space are both clear . There is no pneumothorax . Clips in the right upper quadrant are compatible with prior cholecystectomy .
    OUTPUT:
    
Small right pleural effusion with right basal atelectasis .