Intensity plots of FDG uptake in the cardiac lobe at various times after pneumonectomy. (A) A CT image of the transverse plane of the post-pneumonectomy lung identifying the location of the heart, right middle lobe (RML), right lower lobe (RLL), and cardiac lobe (CL). FDG-PET intensity profiles of a similar transverse plane on the day of surgery (B) and days 3 (C), 7 (D), 14 (E), and 21 (F) after pneumonectomy. Apparently increased uptake in the cardiac lobe is denoted (large arrow). Representative images at each time point are shown.