Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Portable semi-erect chest film ___ at 04 : 26 is submitted .
    OUTPUT:
    
Endotracheal tube and nasogastric tube are likely unchanged in position . There is improving aeration in the left hemithorax but persistent consolidation in the left upper and lower lobes consistent with lobar atelectasis , infection , or pulmonary hemorrhage . Clinical correlation is advised . There is likely a layering effusion . The right lung also has improved aeration suggesting that there likely was a component of superimposed edema . No obvious pneumothorax . Cardiac and mediastinal contours are difficult to assess due to the left hemithorax airspace process .