Diffusion-weighted Magnetic Resonance Imaging: What Makes Water Run Fast or Slow

被引：63

作者：

Fornasa, Francesca ^{[1
]}

机构：

[1] S Bonifacio Hosp, Dept Radiol, 1,via Fontanelle,37042 S Bonifacio, Verona, Italy

来源：

JOURNAL OF CLINICAL IMAGING SCIENCE | 2011年 / 1卷

关键词：

Diffusion weighted imaging; MR imaging; water; MRI Physics;

D O I：

10.4103/2156-7514.81294

中图分类号：

R8 [特种医学]; R445 [影像诊断学];

学科分类号：

1002 [临床医学]; 100207 [影像医学与核医学]; 1009 [特种医学];

摘要：

Diffusion-Weighted Magnetic Resonance Imaging (DWI) obtains information useful in diagnosing several diseases through the measurement of random, Brownian diffusion of water molecules in tissues. This pictorial essay illustrates the main factors, i.e., ratio between the volume occupied by cells and the extracellular space, composition of the extracellular space, and temperature, that determine the rate of the water diffusion. The mechanism through which these influencing factors affect water diffusion is explained. Clinical and experimental examples, derived both from physiology and from non-human models, are described.

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