英语语法分析

Volume data segmentation is the premise of voxel modeling.

体数据分割是体素建模的前提。

It goes beyond 2-d raster formats to include voxel, or 3-d, raster format.

它突破了二维栅格格式，可包括体元(voxel)或三维栅格格式。

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。