Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: ET tube , NG tube , and right IJ line nominal in position . No pneumothorax detected . Small left pleural effusion and atelectasis at the left base may be slightly worse . Atelectasis at the right base is similar or slightly improved . Minimal blunting of the right costophrenic angle is unchanged . There is upper zone redistribution and mild CHF , not significantly changed .
    OUTPUT:
    
1 . Possible slight worsening of small left pleural effusion and associated atelectasis . 2 . Mild CHF is probably unchanged . 3 . Minimal right base atelectasis and blunting of the right costophrenic angle is unchanged .