Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Portable upright view of the chest demonstrates near complete opacification of right hemithorax . Degree of right lung aeration has significantly decreased since ___ exam with small asegment of aerated lung in the right apex remaining . Left lung remains clear . No pneumothorax or pleural effusion . Hilar and mediastinal silhouettes are unchanged . Cardiac size is difficult to discern due to adjacent opacities . Partially imaged upper abdomen is unremarkable .
    OUTPUT:
    
In comparison to ___ exam , there is interval progression of right hemithorax opacification , which likely reflects combination of lung consolidation and pleural fluid .