Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Compared with the prior film , the right chest is grossly unchanged . There may have been slight interval improvement in the right base aeration . There is increased opacity at the right base suggestive a combination of consolidation and only minimal pleural fluid . Right - sided chest tube again noted . The possibility of a tiny right apical pneumothorax can not be excluded . Cardiomegaly with a pacemaker is again seen , unchanged . Left lung remains grossly clear . Doubt CHF . Old healed right posterior rib fractures again noted .
    OUTPUT:
    
Possible new tiny right apical pneumothorax . Continued right base opacity . This likely represents combination of right base consolidation and a small amount of pleural fluid . Aeration at the right lung base may be slightly improved .