Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: A left subclavian central venous catheter is present with the tip in the upper SVC . The enteric tube has been removed . Since the prior exam , the lung volumes have improved . There is stable mild bibasilar atelectasis . There is no pleural effusion , pulmonary edema , or pneumothorax . The mediastinal contours are normal . The heart size is mildly enlarged .
    OUTPUT:
    
Improved lung volumes . No evidence of pulmonary edema .