Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Redemonstration of moderate - to - severe cardiomegaly is noted . There is pulmonary vascular congestion consistent with edema . There is vague increased opacity at the left costophrenic angle which may reflect atelectasis versus a small pleural effusion . Redemonstration of a left subclavian venous stent is again noted . There is no evidence of pneumoperitoneum . Osseous structures are unchanged .
    OUTPUT:
    
1 . Opacity at left costophrenic angle likely reflects atelectasis vs . pleural fluid . 2 . Pulmonary edema .