Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Moderate pulmonary edema has resolved . There is blunting of the posterior right costophrenic angle which may reflect atelectasis or a small effusion . The cardiac silhouette remains mildly enlarged . There is no pleural effusion or pneumothorax . The mediastinum and hilar contours are unremarkable .
    OUTPUT:
    
Resolution of pulmonary edema with atelectasis versus a tiny effusion in the posterior right lower hemithorax .