Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The right hemithorax is nearly completely opacified , and the degree of opacification has slightly worsened compared to the prior study with only a small amount of residual aerated lung in the right upper lobe . The right main bronchus is markedly narrowed and irregular in contour , consistent with involvement by known non-small cell lung cancer as demonstrated on prior chest CT ___ ___ . Left lung is grossly clear . Small left effusion has decreased in size . Sclerosis of the T8 and T9 vertebral bodies is also noted .
    OUTPUT:
    
1 . Worsening opacification of the right hemithorax , consistent with near - complete collapse of the right lung secondary to known central lung cancer , and accompanied by pleural effusion and pleural thickening . 2 . Near resolution of small left pleural effusion .