dural sac短语¹¹⁴⁴⁶⁷⁺⁴ 基本例句 医硬脊膜囊 Depending on the postures, the mean dural/span> sac cross- sectional area and AP dural sac diameter changed. 硬脊膜囊的平均横截面积和前后径随体位的不同而发生变化。 med66 AP dural sac diameter on axial and midsagittal images showed a similar tendency. 前后径在轴位和正中矢状位上呈现相似的变化趋势。 med66