Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: A left chest tube remains in unchanged position . There is interval improvement in left upper lung patchy opacities with residual left lower lung opacity opacities persisting . The right lung remains clear . The right port is in unchanged position . No pneumothorax is present . The left pleural effusion remains small . Subcutaneous edema tracks along the left lateral chest wall .
    OUTPUT:
    
1 . Small residual left pleural effusion not significantly change from yesterday . 2 . Improvement in the left upper lung patchy opacities with persistent patchy opacities in the left lower lung .