Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Heart size is normal . There is mild tortuosity of the thoracic aorta . The mediastinal and hilar contours are normal . The pulmonary vasculature is normal . There is minimal atelectasis at the right base . Otherwise the lungs are clear . There is a possible small right pleural effusion . No evidence of pneumothorax .
    OUTPUT:
    
Minimal right basal atelectasis and small right pleural effusion with no evidence of pneumothorax .