Objective. To determine if a steady-state free precession (SSFP) diffusion-weighted MRI is useful for differentiating sacral insufficiency fractures from metastases of the sacrum.
目的：明确稳态自由运动(SSFP) MRI弥散成像对于鉴别骶骨应力性骨折与骶骨转移瘤是有效的。
Objective: to study the regular rule of changes in endothelial cells morphometric feature under steady flow state, and to investigate the effects of shear stress on the structure of vascular intima.
目的：探讨稳态层流下的内皮细胞特征变化规律和血流切应力改变对血管内膜结构的影响。
Objective To analyse the effects on occupational workers hearing loss caused by steady state noise, impulsive noise and segmental vibration.
目的比较和分析稳态噪声、脉冲噪声、脉冲噪声与振动联合作用对作业工人听力的影响。
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