Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: A portable frontal chest radiograph again demonstrates a Swan - Ganz catheter with the tip in the main pulmonary artery and a right chest pigtail catheter . There is increased mild to moderate pulmonary edema , with apparent decrease in a right pleural effusion , which could be positional . Cardiomegaly is unchanged . No pneumothorax is identified .
    OUTPUT:
    
1 . Increased mild to moderate pulmonary edema . 2 . Apparent decrease in a right pleural effusion , which could be in part positional .