介入性磁共振成像中的图像引导立体定向技术。
Image-guided stereotaxy in the interventional MRI.
作者信息
Samset E, Hirschberg H
机构信息
The Interventional Centre, The National Hospital of Norway, University of Oslo, Norway.
出版信息
Minim Invasive Neurosurg. 2003 Feb;46(1):5-10. doi: 10.1055/s-2003-37967.
BACKGROUND
Stereotactic procedures employing frame-based systems and utilizing pre-operative MR or CT have several shortcomings such as long procedure time, patient discomfort and transport, poor fail-safe capabilities and targeting inaccuracies due to brain shift. Conducting all procedural steps in an interventional MRI has the potential of alleviating some of these deficiencies.
METHODS
A stereotactic system consisting of a skull-mounted mechanical positioning device and customized navigation software has been developed. The accuracy of this system was tested within an interventional MRI employing a skull phantom.
RESULTS
The mean distance between the targets hit and the planned target coordinates was 0.70 mm +/- 0.3 mm with a maximum distance of 1.3 mm.
INTERPRETATION
The results indicate that the proposed stereotactic system can be used for stereotactic procedures in the interventional MRI.
背景
采用基于框架的系统并利用术前磁共振成像（MR）或计算机断层扫描（CT）的立体定向手术存在几个缺点，如手术时间长、患者不适与转运、故障安全能力差以及因脑移位导致的靶向不准确。在介入性磁共振成像中进行所有手术步骤有可能缓解其中一些不足。
方法
已开发出一种由安装在颅骨上的机械定位装置和定制导航软件组成的立体定向系统。该系统的准确性在使用颅骨模型的介入性磁共振成像中进行了测试。
结果
命中靶点与计划靶点坐标之间的平均距离为0.70毫米±0.3毫米，最大距离为1.3毫米。
解读
结果表明，所提出的立体定向系统可用于介入性磁共振成像中的立体定向手术。
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