Glossop Neil D
Traxtal Technologies Inc., 49 Spadina Avenue, No. 310, Toronto, ON M5V 2J1, Canada.
J Bone Joint Surg Am. 2009 Feb;91 Suppl 1:23-8. doi: 10.2106/JBJS.H.01362.
Tracking systems are critical to all types of computer-assisted image-guided intervention. Many technologies exist; however, only optical and electromagnetic systems are widely used commercially. In orthopaedic applications, optical systems dominate because of the large working volume and accuracy, but these systems suffer from deficiencies due to line of sight. Electromagnetic trackers can be made much smaller but are less accurate and are affected by metal, although current-generation systems are less affected by metal artifacts than were the earlier ones, which were more widely reported in the literature.
跟踪系统对于所有类型的计算机辅助图像引导介入手术都至关重要。现有多种技术；然而，只有光学和电磁系统在商业上得到广泛应用。在骨科应用中，光学系统因其较大的工作空间和精度而占主导地位，但这些系统由于视线问题存在缺陷。电磁跟踪器可以做得小得多，但精度较低且会受到金属的影响，尽管与文献中广泛报道的早期系统相比，当前一代系统受金属伪影的影响较小。
