Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Since the prior study , lung volumes have decreased and there has been development of interstitial edema and small bilateral pleural effusions . Heart size is slightly larger . Retrocardiac opacification likely represents left lower lobe atelectasis . Lung apices are well aerated . Sternal wires and mediastinal clips are unremarkable . No pneumothorax .
    OUTPUT:
    
1 . Mild - to - moderate pulmonary edema and bilateral pleural effusions , new since the outside hospital radiograph of ___ . 2 . New retrocardiac opacification , reflecting left lower lobe atelectasis .