Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Stable substantial cardiac enlargement without pulmonary vascular congestion . There is interval improved pulmonary edema and resolution of patchy right basilar infiltrate with focal linear area of left - sided retrocardiac opacification . The nasogastric tube has been removed . Mediastinal contours are stable from previous examination . Continuous lucency under the diaphragm is consistent with pneumoperitoneum secondary to PEG tube .
    OUTPUT:
    
1 . Stable cardiomegaly without pulmonary vascular congestion . This discordance suggests the possibility of cardiomyopathy or pericardial effusion . 2 . Left retrocardiac opacification likely represents atelectasis although superinfection can not be excluded especially in the absence of a lateral view .