Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Portable AP chest radiograph . The Swan - Ganz catheter has been removed and a Cordis sheath remains in place . Median sternotomy wires are intact . A gas collection below the left hemidiaphragm is due to new gastric distension . Lung volumes remain low with bibasilar atelectasis . However , aeration of the right lung has improved and the right pleural effusion has decreased . Although the pulmonary vasculature is engorged , there is no edema . There is no pneumothorax .
    OUTPUT:
    
New gastric distension . Preliminary findings were discussed by Dr . ___ with ___ ( cardiac surgery ) by phone at 9 :43 a .m . ( 5 minutes after discovery ) on ___ . Final reading discussed by Dr ___ ___ Ms . ___ at 3 pm .