TY - JOUR T1 - Deformation of the Pelvic Arteries Caused by Pneumoperitoneum and Postural Changes in an Animal Model JF - In Vivo JO - In Vivo SP - 275 LP - 281 DO - 10.21873/invivo.12256 VL - 35 IS - 1 AU - HIDEMICHI KIYOMATSU AU - LEI MA AU - JUNCHEN WANG AU - TOMOMICHI KIYOMATSU AU - HIROYUKI TSUKIHARA AU - ETSUKO KOBAYASHI AU - ICHIRO SAKUMA AU - SOUICHIRO ISHIHARA Y1 - 2021/01/01 UR - http://iv.iiarjournals.org/content/35/1/275.abstract N2 - 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. ER -