Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Compared with ___ , retrocardiac opacity with may have increased slightly , consistent with increased left lower lobe collapse and / or consolidation . There is also slight blunting of left costophrenic angle which is more pronounced and could reflect an accumulating small left pleural effusion . Minimal blunting of the right costophrenic angle is similar to the prior study . There is upper zone redistribution , but no overt CHF . Previously seen vascular plethora is slightly improved . Cardiomediastinal silhouette is grossly unchanged . Known left - sided rib fractures are not well visualized sclerotic density overlying the T12 or L1 vertebral body could reflect prior vertebroplasty .
    OUTPUT:
    
Slight worsening of left lower lobe collapse and / or consolidation . Suspected small left effusion may be slightly larger . No gross effusion . Interval improvement in CHF findings , now with upper zone redistribution , but improved vascular plethora . Small right pleural effusion is similar to prior .