其中，血管管径的大小又是影响阻力的决定因素。

Among them, the size of blood vessel diameter is the determining factor in the impact resistance.

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目的：探讨脑缺血时微血管管径与一氧化氮释放的关系。

OBJECTIVE: To investigate the correlation between the microvascular diameter and NO in cerebral ischemia.

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如何准确提取DSA血管边缘对于血管管径的测量具有重要的意义。

How to find out the artery edge of DSA has good significance on the measurement of artery diameter.

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