Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Patient is status post median sternotomy CABG . Cardiomegaly is re - demonstrated unchanged . Dense aortic knob atherosclerotic calcifications are re- demonstrated . Mediastinal contour is relatively unchanged . There is mild pulmonary edema , slightly improved in the interval , with perihilar haziness and vascular indistinctness . Moderate right pleural effusion appears relatively unchanged and small left pleural effusion is slightly increased . Bibasilar patchy opacities likely reflect compressive atelectasis . No pneumothorax . No acute osseous abnormality is visualized . Right internal jugular central venous catheter has been removed .
    OUTPUT:
    
Mild pulmonary edema , slightly improved in the interval . Unchanged moderate right pleural effusion and slightly increased small left pleural effusion . Probable bibasilar atelectasis .