Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: At the right pleural effusion has redistributed , now layering at the base . Bilateral parenchymal opacification decreased compared with 2 hours prior consistent with decreased pulmonary edema . Opacity at the right medial lung base could represent atelectasis or consolidation . A curve in the trachea is seen on end giving the appearance of the rounded lucency . No pneumothorax .
    OUTPUT:
    
1 . Right pleural effusion now layering at the base and no longer seen at the apex , likely positional . 2 . Interval improvement in pulmonary edema . 3 . The right medial basilar opacification could represent atelectasis or consolidation . 4 . A curve in the trachea seen on end gives the appearance of a rounded lucency within the mediastinum .