Hidemichi Kiyomatsu1, Lei Ma2, Junchen Wang3, Tomomichi Kiyomatsu4, Hiroyuki Tsukihara2, Etsuko Kobayashi2, Ichiro Sakuma2, Souichiro Ishihara4. 1. Department of Surgical Oncology, Faculty of Medicine, The University of Tokyo, Tokyo, Japan; kiyomatsu71@yahoo.co.jp. 2. Graduate School of Engineering, The University of Tokyo, Tokyo, Japan. 3. School of Mechanical Engineering and Automation, Beihang University, Beijing, P.R. China. 4. Department of Surgical Oncology, Faculty of Medicine, The University of Tokyo, Tokyo, Japan.
Abstract
BACKGROUND/AIM: We investigated pelvic arterial deformation and shift due to intraoperative pneumoperitoneum and postural changes in an animal model. MATERIALS AND METHODS: Computed tomography images of pigs were acquired in different body positions (supine, head down at 5° and 10°, right lateral recumbent at 5° and 15°) before and after insufflation. We used a free software (3D Slicer) for image analysis. After landmark registration using 10 markers inserted into the pelvis, pelvic arterial deformation and shift of seven arterial bifurcation points were evaluated. The distance moved was the target registration error (TRE) from the points registered in the supine position. Fiducial registration error (FRE) was measured using the 10 pelvic markers. RESULTS: TRE average from postural changes ranged from 0.7 to 1.2 mm and was 1.4 mm due to pneumoperitoneum. TRE and FRE averages were 2.1 mm and 0.2 mm, respectively. CONCLUSION: The pelvis was useful for registering anatomical landmarks. Copyright
BACKGROUND/AIM: We investigated pelvic arterial deformation and shift due to intraoperative pneumoperitoneum and postural changes in an animal model. MATERIALS AND METHODS: Computed tomography images of pigs were acquired in different body positions (supine, head down at 5° and 10°, right lateral recumbent at 5° and 15°) before and after insufflation. We used a free software (3D Slicer) for image analysis. After landmark registration using 10 markers inserted into the pelvis, pelvic arterial deformation and shift of seven arterial bifurcation points were evaluated. The distance moved was the target registration error (TRE) from the points registered in the supine position. Fiducial registration error (FRE) was measured using the 10 pelvic markers. RESULTS: TRE average from postural changes ranged from 0.7 to 1.2 mm and was 1.4 mm due to pneumoperitoneum. TRE and FRE averages were 2.1 mm and 0.2 mm, respectively. CONCLUSION: The pelvis was useful for registering anatomical landmarks. Copyright
Authors: Jasper Nijkamp; Koert F D Kuhlmann; Oleksandra Ivashchenko; Bas Pouw; Nikie Hoetjes; Melanie A Lindenberg; Arend G J Aalbers; Geerard L Beets; Frits van Coevorden; Niels KoK; Theo J M Ruers Journal: J Surg Oncol Date: 2018-12-24 Impact factor: 3.454