Raabe Andreas, Krishnan René, Wolff Robert, Hermann Elvis, Zimmermann Michael, Seifert Volker
Department of Neurosurgery, Neurocenter, Johann Wolfgang Goethe University, Frankfurt am Main, Germany.
Neurosurgery. 2002 Apr;50(4):797-801; discussion 802-3. doi: 10.1097/00006123-200204000-00021.
To report our clinical experience with a new laser scanning-based technique of surface registration. We performed a prospective study to measure the calculated registration error and the application accuracy of laser surface registration for intracranial image-guided surgery in the clinical setting.
Thirty-four consecutive patients with different intracranial diseases were scheduled for intracranial image-guided surgery by use of a passive infrared surgical navigation system. Surface registration was performed by use of a Class I laser device that emits a visible laser beam. The Polaris camera system (Northern Digital, Waterloo, ON, Canada) detects the skin reflections of the laser, which the software uses to generate a virtual three-dimensional matrix of the anatomy of each patient. An advanced surface-matching algorithm then matches this virtual three-dimensional matrix to the three-dimensional magnetic resonance therapy data set. Registration error as calculated by the computer was noted. Application accuracy was assessed by use of the localization error for three distant anatomic landmarks.
Laser surface registration was successful in all patients. For the surgical field, application accuracy was 2.4 +/- 1.7 mm (range, 1-9 mm). Application accuracy was higher for the surgical field of frontally located lesions (mean, 1.8 +/- 0.8 mm; n = 13) as compared with temporal, parietal, occipital, and infratentorial lesions (mean, 2.8 +/- 2.1 mm; n = 21).
Laser scanning for surface registration is an accurate, robust, and easy-to-use method of patient registration for image-guided surgery.
报告我们使用基于激光扫描的新表面配准技术的临床经验。我们进行了一项前瞻性研究，以测量在临床环境中用于颅内图像引导手术的激光表面配准的计算配准误差和应用准确性。
连续34例患有不同颅内疾病的患者计划使用被动红外手术导航系统进行颅内图像引导手术。使用发射可见激光束的I类激光设备进行表面配准。北极星相机系统（加拿大安大略省滑铁卢市的北方数字公司）检测激光的皮肤反射，软件使用该反射生成每个患者解剖结构的虚拟三维矩阵。然后，一种先进的表面匹配算法将这个虚拟三维矩阵与三维磁共振治疗数据集进行匹配。记录计算机计算出的配准误差。通过三个远处解剖标志点的定位误差评估应用准确性。
所有患者的激光表面配准均成功。对于手术区域，应用准确性为2.4±1.7毫米（范围为1 - 9毫米）。与颞叶、顶叶、枕叶和幕下病变（平均2.8±2.1毫米；n = 21）相比，额叶病变手术区域的应用准确性更高（平均1.8±0.8毫米；n = 13）。
用于表面配准的激光扫描是一种准确、可靠且易于使用的图像引导手术患者配准方法。
