方法：222例均先作选择性或超选择性造影，对没有显示病变或显示病变不完全的病例加摄斜位；

Methods:222 cases underwent selective or super-selective angiography and in the cases whose lesion was not shown or shown incompletely oblique position was taken.

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本文证明了球面有限点集的伪对称性可以完全由其特征多项式的根来刻画，并得到了在度量加运算下伪对称性具有封闭性。

In this paper, we show that the Pseudo-Symmetric property of spherical point set can be characterized by the eigen values of eigenpolynomial and it has the closeness under the metric sum operation.

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我们提出了圆加垂直弧段及三棱锥的三棱线这两种新的锥顶轨迹，并研究了以其进行精确重建所需的完全性条件。

In this paper two new cone vertex orbits, which are circle and arc and regular triangular pyramid lines, have been proposed and their complete conditions for exact reconstruction have been obtained.

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