Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The patient is status post median sternotomy and aortic valve replacement . A right internal jugular central venous catheter is unchanged in position with the tip terminating in the low SVC . A small caliber left IJ line is also noted . The lung volumes are slightly decreased . There is slight elevation of the left hemidiaphragm compared to the right . The cardiac silhouette remains enlarged but stable . The mediastinal contours are prominent postoperatively . There is mild calcification of the aortic knob . Mild to moderate pulmonary edema is increased from the most recent prior study . There is increased streaky opacification at the right lung base compared to the most recent prior study . In the absence of aspiration , this most likely reflects atelectasis . Mild opacification of the left lung base is unchanged and compatible with mild atelectasis . No significant pleural effusion or pneumothorax is detected .
    OUTPUT:
    
1 . Mild to moderate pulmonary edema , increased from ___ . 2 . Small right pleural effusion and bibasilar atelectasis on the right greater than the left .