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首页> 外文会议>Annual International Conference of the IEEE Engineering in Medicine and Biology Society >Statistical Shape Modeling to Determine the Anterior Pelvic Plane for Total Hip Arthroplasty*
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Statistical Shape Modeling to Determine the Anterior Pelvic Plane for Total Hip Arthroplasty*

机译：统计形状建模，以确定全髋关节置换术的前骨盆平面*

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摘要

The anterior pelvic plane (APP) defined by both iliac spines and the pubic symphysis, is essential in total hip arthroplasty (THA) for the orientation of the prosthetic cup. However, the APP is nowadays still difficult to determine in computer assisted orthopedic surgery (CAOS). We propose to use a statistical shape model (SSM) of the pelvis to estimate the APP from ipsilateral anatomical landmarks, more easily accessible during surgery in computer assisted THA with the patient in lateral decubitus position. A SSM of the pelvis has been built from 40 male pelvises. Various ipsilateral anatomical landmarks have been extracted from these data and used to deform the SSM. Fitting the SSM to several combinations of these landmarks, we were able to reconstruct the pelvis with an accuracy between 2.8mm and 4.4mm, and estimate the APP inclination with an angular error between 1.3° and 2.8°, depending on the landmarks fitted. Results are promising and show that the APP could be acquired during the intervention from ipsilateral landmarks only.
机译：由棘和耻骨联合定义的前骨盆平面（APP）在全髋关节置换术（THA）中对假体杯的定位至关重要。但是，如今在计算机辅助骨科手术（CAOS）中仍然难以确定APP。我们建议使用骨盆的统计形状模型（SSM）从同侧解剖标志物估算APP，在患者侧卧位的计算机辅助THA手术期间更易于访问。骨盆的SSM由40个男性骨盆组成。从这些数据中提取了各种同侧解剖标志，并将其用于使SSM变形。通过将SSM拟合到这些地标的几种组合，我们能够以2.8mm至4.4mm的精度重建骨盆，并根据所安装的地标估算APP的倾斜度，其角度误差在1.3°至2.8°之间。结果是有希望的，并且表明在干预过程中只能从同侧标志物获取APP。

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