MRA 检查采用三维时间飞跃法，对源图像做最大强度投影重建血管影像。

MRA used 3 dimensional time of flight method and demonstrated the intra cranial arteries with the maximum intensity projection (MIP) of the source images.

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所有患者术前均采用三维时间飞跃（3D-TOF）序列技术经磁共振成像（MRI）检查脑血管病变情况；

The conditions of cerebrovascular diseases were examined by three dimensional time of flight (3D-TOF) nuclear magnetic resonance (MRI).

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