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.

中文翻译：

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气腹引起的骨盆动脉变形和动物模型的姿势变化

背景/目的：我们在动物模型中研究了由于术中气腹和姿势变化引起的骨盆动脉变形和移位。材料和方法：在不同的体位（仰卧，头朝下 5°和 10°，右侧卧位 5°和 15°）在充气前后获取猪的计算机断层扫描图像。我们使用免费软件（3D Slicer）进行图像分析。使用插入骨盆的 10 个标记进行界标配准后，评估骨盆动脉变形和七个动脉分叉点的移位。移动的距离是与仰卧位注册点的目标注册误差 (TRE)。使用 10 个骨盆标记测量基准配准误差 (FRE)。结果：姿势变化的 TRE 平均值在 0.7 到 1.2 毫米之间，为 1。4 毫米由于气腹。TRE 和 FRE 平均值分别为 2.1 毫米和 0.2 毫米。结论：骨盆有助于记录解剖标志。