Hirschberg H
Department of Neurosurgery, Rikshospitalet, Oslo, Norway.
Stereotact Funct Neurosurg. 1996;66(1-3):96-101. doi: 10.1159/000099675.
Image-directed neurosurgical systems allow the correlation of a point in the operative field to a corresponding point on the patient's CT/MR scans. We have modified a surgical microscope by mounting three light-emitting diodes (LEDs) on a small frame attached to the microscope. The operative field was registered to the MR scans by indexing four MR/patient visible fiducial points with a LED pointing device. To calibrate the microscope, the probe point was focused and centered in the microscopic field of view with the aid of cross hairs in the microscope ocular. The focal plane of the microscope could now be tracked in addition to the probe tip. During surgery the point of interest is centered in the cross hairs and brought into focus, and the corresponding point is indicated in three planar views on MR scans.
图像引导神经外科手术系统可将手术区域中的一点与患者CT/MR扫描上的对应点进行关联。我们通过将三个发光二极管（LED）安装在附于显微镜的一个小框架上，对一台手术显微镜进行了改装。利用一个带LED的定位装置对四个MR/患者可见的基准点进行索引，从而将手术区域与MR扫描进行配准。为校准显微镜，借助显微镜目镜中的十字准线将探针点聚焦并置于显微镜视野中心。现在除了探针尖端外，还可以追踪显微镜的焦平面。在手术过程中，将感兴趣的点置于十字准线中心并使其聚焦，然后在MR扫描的三个平面视图中指示出相应的点。
