摘要：目的通过与核素骨显像比较，探讨全身磁共振弥散加权成像(WB - DWI)探测骨转移瘤的可行性及临床价值。
ABSTRACT: Objective To evaluate the feasibility and clinical value of whole body diffusion weighted magnetic resonance imaging (WB-DWI) in detection of bone metastases.
目的：探讨正常人脑及脑梗塞弥散加权平面回波成像(DWEPI)的特点。
Objective: To evaluate the diffusion weighted echo planar imaging (DW EPI) features of brain in normal subjects and in patients with cerebral infarction.
磁共振弥散加权成像（DWI）反映了水分子的微观弥散运动，是从细胞及分子水平来进行疾病研究的新技术；
MR diffusion-weighted imaging(DWI) reflects the microscopic Brownian motion of water molecules. It is a new technology for disease research from the cellular and molecular level.
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