目的：应用弥散张量磁共振成像定量分析大脑胶质瘤的特点。
Objective: To quantify the characteristic of cerebral gliomas by using diffusion-tensor MR imaging.
磁共振动脉自旋标记灌注成像技术是通过对动脉血作磁标记作为内源性对比剂，对脑组织的血流灌注进行定量测量的磁共振成像技术。
Magnetic resonance perfusion imaging of arterial spin labeling is a technique to quantificationally measure the cerebral blood flow using the labeling arterial blood as a endogenous tracer.
定量地分析不同年龄段正常脑白质磁共振扩散加权成像ADC值，建立正常脑白质及灰质ADC值标准，为评价放射性脑损伤提供参考值。
To quantitatively study the ADC values of normal white matter with advancing age on diffusion and establish reference values of ADC for further studies of radiation-induced injury.
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