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。

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Objective: To evaluate the value of diffusion-weighted magnetic resonance imaging (MRI-DWI) in diagnosing acute cerebral-infarction.

目的：探讨扩散加权磁共振成像在急性脑梗死诊断中的价值。

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Objective To compare the efficacy of routine magnetic resonance imaging(MRI) to that of diffusion-weighted imaging(DWI) in the diagnosis of multiple sclerosis(MS).

目的比较常规磁共振（MRI）检查和弥散加权磁共振（DWI）检查技术对多发性硬化（MS）的诊断价值。

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