Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: AP portable upright view of the chest . Dialysis catheter again seen with its tip in the cavoatrial junction region . Midline sternotomy wires and mediastinal clips again noted . There is cardiomegaly unchanged with hilar congestion and mild pulmonary edema . Bibasilar opacities may reflect atelectasis with probable small pleural effusions noted bilaterally . No large pneumothorax . Bony structures appear intact . Aortic calcification is noted .
    OUTPUT:
    
Mild to moderate pulmonary edema with small bilateral pleural effusions .