Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Upright portable radiograph of the chest demonstrates unchanged position of dual - lead AICD , with leads terminating in the right atrium and right ventricle . The cardiac size is unchanged since the prior study , and there is a new pericardial drain in place . Increased retrocardiac opacification is likely due to atelectasis , and increased bilateral interstitial markings reflect mild underlying edema . Bilateral reticular opacities are unchanged due to interstitial pulmonary fibrosis , along with stable left apical scarring . There is no pneumothorax . The proximal esophagus is distended with air , possible due to dysmotility .
    OUTPUT:
    
1 . Mild acute interstitial edema . 2 . Increased left retrocardiac opacity , likley atelectasis . 3 . Distended proximal esophagus , possibly due to dysmotility . Consider barium study if esophageal symptoms are present .