Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Portable AP chest radiograph is obtained . Endotracheal tube is no longer visualized . Cardiomediastinal contours are stable . Right lung remains clear . Small left pleural effusion is again noted . Left lung is better aerated . No pneumothorax .
    OUTPUT:
    
Better aeration of the left lung with persistent small left pleural effusion .