Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There is mild interstitial pulmonary edema . The heart size is difficult to assess given low lung volumes . A small right pleural effusion persists . There is no pneumothorax . The mediastinal contours are unchanged . There has been interval removal of a right internal jugular central venous catheter .
    OUTPUT:
    
1 . Mild interstitial pulmonary edema . 2 . Small right pleural effusion , not significantly changed .