Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Compared to the prior study , there is now near complete opacification of the left chest , with multiple small lucent foci in the upper half of the lung which likely represent small areas of aerated long versus focal air within fluid . New compared to the prior study , sternotomy wires and midline mediastinal skin ___ are now visualized , compatible with interval surgery . There has been leftward shift of the mediastinum , likely contributing to the left chest opacity . The left chest tube , mediastinal drains , and 2 Swan - Ganz catheter have all shifted leftward . The plane of imaging of the prosthetic valve is also slightly different . The right chest tube remains in place , canal lying slightly lower over the lower right lung . The carina is not well delineated , but I suspect the ET tube tip lies approximately 3 .6 cm above the carina . An NG tube is present , tip and side - port overlying the upper stomach . Aside from mild plethora of upper zone vessels in the right lung , the right lung is grossly clear . Large rounded calcification , likely a large gallstone , again noted in the right upper abdomen
    OUTPUT:
    
Interval surgery , with marked leftward shift of the mediastinum into the left chest , together with associated drains , catheters and prosthetic valve , with resultant near - complete opacification of the left lung . This presumably suggests significant left - sided atelectasis . The right lung remains grossly clear , with only mild upper zone redistribution .