Objective to study the line from infraorbital edge to external acoustic meatus as a scanning baseline in the location of AC-PC plane.

目的研究外耳门中点与眶下缘最低点的连线(简称眶听线)作为扫描基线对获得AC - PC平面的临床价值。

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This paper researched the realization of PC-based linear AC servo system after hardware and software platform are confirmed.

在上述系统软、硬件平台确定以后，研究了基于PC机的直线交流伺服系统的具体实现方法。

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Materials and Methods: The coordinates of the anterior commissure(AC) and posterior commissure (PC) were measured and compared in 17 patients with Parkinson's disease.

材料和方法：在17例帕金森病患者中测量和比较前连合（AC）和后连合（PC）的坐标。

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