Klimek L, Kainz J, Reul J, Mösges R
Universitäts-HNO-Klinik Mainz.
HNO. 1993 Dec;41(12):582-6.
Computer-assisted surgery (CAS) is a new intraoperative localization system that is based on digital image generation devices. The system has been used in 189 cases of paranasal sinus procedures, employing computed tomography (CT) image data. Highly accurate imaging and localization of bony structures can be achieved in this way, although definition of vascular structures is limited by representation attributes of vessels in CT. Algorithms have now been developed for the use of magnetic resonance angiography (MRA) data with the system. CAS was used in six cases of endonasal surgery. Imaging helped substantially in all cases, but its application was limited by incomplete reflection of small vessels. In one case, intraoperative findings showed MRA-inherent inaccuracies. These might be avoided using correction programs and phantom selection (shimming) procedures in the future. Additionally, matching of different imaging modalities should improve intraoperative applications of CAS.
计算机辅助手术（CAS）是一种基于数字图像生成设备的新型术中定位系统。该系统已应用于189例鼻窦手术，采用计算机断层扫描（CT）图像数据。通过这种方式可以实现对骨质结构的高精度成像和定位，尽管血管结构的清晰度受到CT中血管表现属性的限制。目前已经开发出将磁共振血管造影（MRA）数据与该系统结合使用的算法。CAS应用于6例鼻内手术。成像在所有病例中都有很大帮助，但其应用受到小血管显示不完整的限制。在1例病例中，术中发现显示MRA存在固有误差。未来通过使用校正程序和体模选择（匀场）程序可能避免这些误差。此外，不同成像模态的匹配应能改善CAS的术中应用。
