Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Lung volumes are slightly increased with residual bibasilar atelectasis . Mild pulmonary edema is improved from ___ . The left apical mass - like opacity is unchanged . Multiple vague opacities may represent combination of atelectasis and edema or evolving pneumonia . A small left pleural effusion is likely improved from ___ but difficult to assess given differences in technique . No substantial right pleural effusion . Postoperative mediastinal contours and cardiac borders are stable .
    OUTPUT:
    
1 . Small left pleural effusion likely slightly improved from ___ . 2 . Mild pulmonary edema improved from ___ . 3 . Vague bilateral opacities could represent developing pneumonia or combination of atelectasis and pulmonary edema .