Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The patient has been extubated . There is still mild pulmonary edema but significantly improved since ___ . Mediastinal and cardiac contour enlargement is probably explained by mediastinal fat and vascular congestion . There is no pleural effusion or pneumothorax .
    OUTPUT:
    
Mild residual pulmonary edema has significantly improved since ___ . The patient has been extubated .