基于数字血管减影的无框架立体定位算法的研究

The study of a frameless stereotatic localization method using DSA

本文提出了一种基于数字血管减影的无框架立体定位算法。该方法利用一个定位板、四个定位头标和两幅数字血管减影的投影图像，通过定义参考定位坐标系和进行两次坐标变换，可完全确定空间一点相对于参考定位坐标系的三维坐标。经过计算机仿真表明，该算法理论正确，结果可靠，为利用数字血管减影进行颅内血管等组织的立体定位提供了一种方法。这种无框架立体定位算法对于放射治疗和进行神经外科手术具有十分重要的意义。

A frameless stereotatic localization method with DSA is introduced in this paper. A locating plate and four head marks are used in the method. Using two projection images of DSA, the three dimension coordinate of any point can be calculated refering to the reference locating coordinate system. The method is the theoretic basis of locating brain structure such as the blood vessel using DSA.