Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Again seen is complete opacification of the left hemi thorax , consistent with massive pleural effusion . Also again seen is rightward shift of the mediastinum , similar to the prior study . The right lung remains grossly clear . Slight blunting of the right costophrenic angle , consistent with small right effusion is again noted . There may be subtle atelectasis at the right base is well . No CHF . Again noted are surgical clips overlying the lower left mediastinum .
    OUTPUT:
    
Hazy opacity at the right lung base may represent some early atelectasis . Otherwise , doubt significant interval change . Complete opacification of left hemi thorax in rightward shift of the mediastinum are similar to the chest x-ray from 1 day earlier .