Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Cardiac , mediastinal and hilar contours are normal . The pulmonary vasculature is not engorged . Curvilinear opacity is in the right lung base likely reflects an area of subsegmental atelectasis . No focal consolidation , pleural effusion or pneumothorax is seen . There is no subdiaphragmatic free air .
    OUTPUT:
    
Subsegmental right basilar atelectasis . Otherwise , no acute cardiopulmonary abnormality .