Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Dual - lumen left central line catheter tip lies at right upper atrium . The ___ severe pulmonary edema is unchanged in severity but has redistributed , with interval improvement in the left lung and worsening on the right side . Normal heart size , mediastinal and hilar contours are stable . No pneumothorax . Small right pleural effusion is unchanged .
    OUTPUT:
    
Since ___ severe pulmonary edema is unchanged in severity but has distribution with interval worsening in the right lung and improved on the left side .