Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Single upright portable radiograph of the chest demonstrates unchanged mild cardiomegaly with bilateral pleural effusions , moderate on the left and small on the right , slightly improved since the prior study from ___ . No focal consolidation concerning for pneumonia is identified . There has also been mild interval improvement in pulmonary edema since the prior study . Bibasilar atelectasis is present . A superior vena cava stent and the superior aspect of the partially visualized central venous catheter appear unchanged in position . There is no pneumothorax .
    OUTPUT:
    
Mild interval improvement pulmonary edema and bilateral pleural effusions , left greater than right , since the prior study . No evidence of pneumonia .