小脑后下动脉脉络点的X线与大体解剖对照研究

A X-ray anatomical and morphological study of the choroidal point of the posterior inferior cerebellar artery

在44具成人尸体正常脑标本上，用硫酸钡碳素墨水悬液作了小脑后下动脉造影，73支显示满意。根据侧位片上颅袢形态以及与第四脑室下髓帆脉络丛的位置关系把所有资料分为5型，认为脉络点应该为脉络动脉的终止处，而不是起点。本组资料表明，脉络点对于判断后颅窝占位性病变的可靠性为69％～80％，并设计出一种客观的定位脉络点的方法。

The posterior cerebellar artery (PICA ) angiography have been done on 44 normal brain specimens of adult corpse with carbonic ink-barium sulphate suspension. 73 PICAs could be identified easily. The authors divided them into 5 types according to the configure of their cranial loops and height closing to the choroidal plexus of the inferior medullary velum of the fourth ventricle. The results showed that the choroidal point was situated at the terminal point of the choroidal artery rather than the starting-point. The reliability of the choroidal point for judging local expansive lesions of the posterior fossa have been estimated. The materials showed that the reliability was between 69%~ 80%. At the same time, author reported an objective method locatizing the choroidal point of the PI CA.