Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Portable single frontal chest radiograph was obtained . There is mild right basilar atelectasis . No focal consolidation , pleural effusion , pneumothorax , or pulmonary edema is seen . The heart size is normal . Mediastinal and hilar contours are normal . No subdiaphragmatic air is present .
    OUTPUT:
    
1 . No radiographic evidence for acute cardiopulmonary process . 2 . No visualized subdiaphragmatic air . If high clinical suspicion for perforation , a repeat standing radiograph or a CT would be more sensitive for detection of subdiaphgragmatic air . Findings were communicated with Dr . ___ by Dr . ___ at time of observation at 4 :53 p .m . on ___ .