Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Portable supine radiograph of the chest demonstrates slight improvement in pulmonary edema following extubation , which may indicate increased cardiac function . If present , pleural effusions are small in size . Mediastinal contour is wide , but unchanged , and this is likely due in part to distention of mediastinal vessels . The right internal jugular central venous line is seen with the tip ending at the mid SVC . No pneumothorax .
    OUTPUT:
    
Slight improvement in pulmonary edema following extubation may indicate improved cardiac function .