Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Since prior , there is little interval change . Endotracheal tube and right chest tube unchanged in position . Right hemithorax is stable as is a small right apical pneumothorax . There has been mild increase in aeration of the left lung . Cardiomediastinal silhouette is stable .
    OUTPUT:
    
Mild improved aeration of the left lung . Otherwise , no interval change .