Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The right IJ catheter terminates in the upper to mid SVC . The patient has been extubated in the interim and an enteric tube has been removed . The lung volumes are unchanged . There is improved aeration of the lung bases with minimal residual atelectasis . The pulmonary vasculature is normal . The cardiac and mediastinal contours are normal . There is no pleural effusion or pneumothorax .
    OUTPUT:
    
Improved aeration at the bases .