Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Left subclavian central venous catheter tip terminates in the mid SVC . The heart size remains moderately enlarged . Numerous clips are seen projecting over the left lower hemi thorax . Mediastinal contour is unchanged . Moderate pulmonary edema persists , perhaps minimally improved in the interval . Small right pleural effusion is unchanged . There is no pneumothorax . Patchy opacities in the lung bases likely reflect atelectasis though infection is difficult to exclude .
    OUTPUT:
    
Persistent moderate pulmonary edema , slightly improved in the interval with similar small right pleural effusion . Patchy bibasilar opacities likely reflect atelectasis though infection is not completely excluded .