Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There is a right supraclavicular central venous catheter which ends in the mid SVC . There appears to be mild interval improvement of the bilateral pulmonary edema with evidence of continued , yet improved vascular engorgement . There appears to be a worsening in opacity in the left retrocardiac region which could be secondary to atelectasis and or worsening pleural effusion , compared to the previous study . The mediastinal contours are stable . There is moderate cardiomegaly , stable at least since ___ .
    OUTPUT:
    
1 . Worsening of the left retrocardiac opacity likely secondary to increasing atelectasis and / or effusion . 2 . Slight improvement of pulmonary edema .