Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There is an improvement in the left perihilar opacification . However , there is still persistent opacification at the right lung base . Support devices remain in stable position . There is no pneumothorax . Cardiomediastinal and hilar contours are stable .
    OUTPUT:
    
1 . Improvement in previously noted focal opacity in the left perihilar area . 2 . Persistent right basilar opacification .