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前后径在轴位和正中矢状位上呈现相似的变化趋势。
AP dural sac diameter on axial and midsagittal images showed a similar tendency.
在正中矢状位图像上测量了L1和S1水平的硬脊膜囊的前后径和上终板角。
On midsagittal images, AP dural sac diameter and the upper-endplate angles of L1 and S1 were measured.
枕大孔水平脊髓前后径及斜径角较正常对照组为小，但枕大孔前后径无明显差别。
Although the spinal foramen magnum anteriorposterior diameter was smaller but not statistically different from the control.
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