Fig. 1.
CT scans of two typical patients undergoing BHD and BHDI. a and b are the preoperative and first postoperative day images of a patient receiving BHDI, respectively. c and d are the preoperative and first postoperative day images of a patient receiving BHD, respectively. Obvious pneumocrania can be observed in image b. This image is from the preliminary report of the present study, which was published in West China Medicine Journal [27]. The authors have got the permission to republish this image