Methods: White matter density was compared among three groups by voxel-based morphometry.
方法：用基于像素的形态学测量法比较三组的白质密度。
The regional cerebral glucose metabolism in the two groups was compared using a voxel-based method.
局部脑葡萄糖代谢的两组相比，使用像素为基础的方法。
The automatic voxel-based spatial normalization methods which were used widely were highly precise but time consuming.
过去被广泛使用的基于体素的自动化归一化方法虽然很精确，但很耗时。
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