高分辨率512矩阵，减小脑组织的信号，小血管的片段显示能力得以改善。

The ability to depict segment of small vessels was improved by 512 high resolution matrix.

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为了达到高分辨率而采用高阶相关矩阵，谱估计的运算量十分大。

In order to yield high resolution, the high-order autocorrelation matrix is used, the number of the operations for the estimation of frequency and power is tremendous.

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同时还讨论了体素尺寸、几何映射获取投影矩阵以及探测器尺寸与成像物体尺寸比值对断层图像空间分辨率的影响。

Then the effects of the voxel size, the geometrical mapping of the projection matrix and the ratio of detector size to imaging object size, on the spatial resolution were discussed.

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