Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: An aortic stent graft is unchanged in position . The heart is moderately enlarged . There is no focal consolidation . There is mild dependent pulmonary edema vascular congestion and a likely small right pleural effusion . .
    OUTPUT:
    
1 . Retrocardiac opacity , similar in appearance to prior chest radiograph , most consistent with atelectasis or scarring . 2 . Mild heart failure .