Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Portable AP chest radiograph . Small right apical pneumothorax is not significantly changed . Small bilateral pleural effusions and atelectasis are stable . Pneumoperitoneum beneath the right hemidiaphram may be related to the pericardial drain , possibly representing an air leak .
    OUTPUT:
    
Stable small right apical pneumothorax . Pneumoperitoneum is not appreciated on prior radiographs and could represent an air leak from the pericardial drain . Findings were discussed by Dr . ___ with Dr . ___ by phone at 4 :29 p .m . on ___ .