Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Compared to the prior study , the overall appearance is similar . Again seen is a chest tube at the left lung base . Also again seen is a small to moderate left effusion with underlying collapse and / or consolidation , similar to the prior study . No pneumothorax is detected . Atelectasis at the right base and minimal blunting of the right costophrenic angle is essentially unchanged . Doubt overt CHF .
    OUTPUT:
    
Doubt significant interval change compared with ___ . The left chest tube position and left base effusion are similar .