Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: AP upright portable chest radiograph is obtained . Given lack of prior studies for comparison , evaluation is quite limited . There is a hyperinflated right lung suggesting underlying emphysema . Trace right pleural effusion and right basilar opacity , likely atelectasis . There is a double density obscuring the left mid and lower lung which could represent left pleural effusion , basilar consolidation , likely also a component of atelectasis . No pneumothorax . Heart size can not be assessed . Also , mediastinal contour is impossible to assess given the adjacent opacity in the left hemithorax . The bony structures appear grossly intact .
    OUTPUT:
    
Limited exam given no prior studies for comparison with large opacity obscuring the majority of the left lung which could be secondary to effusion and consolidation . Right effusion and basilar atelectasis with probable background emphysema .