Diffusion-weighted Imaging in the Abdomen and Pelvis: Concepts and Applications
Diffusion-weighted Imaging in the Abdomen and Pelvis: Concepts and Applications
复制标题
DOI：
10.1148/rg.296095521
复制
发表时间：
2009-10-01
期刊：
影响因子：
5.5
通讯作者：
Qayyum, Aliya
中科院分区：
文献类型：
--
作者：
Qayyum, Aliya
扩散加权磁共振（MR）成像可以检测腹部和骨盆的局灶性实性和囊性病变，如果要避免陷阱，与其他成像序列结合使用是最有效的。重要的是要认识到，扩散敏化梯度（b值）的强度可以而且应该调整，以确保对被成像的身体区域或器官进行最佳评估，并且组织表征需要多个b值。病变检测和表征的成功在很大程度上取决于组织细胞的程度，因为细胞的增加与扩散受阻有关，这可以通过表观扩散系数的降低来表明。同样重要的是要认识到某些正常组织，如子宫内膜是高度细胞化的，因此表现出有限的扩散，这不应被误解为疾病。在高度粘稠的囊性病变如脓肿中也可见弥散障碍。扩散加权成像是一项不断发展的技术，当结果与其他常规磁共振成像序列的结果相结合时，它有可能改善组织特征。(c) rsna， 2009年。radiographics.rsna.org
Diffusion-weighted magnetic resonance (MR) imaging allows the detection of focal solid and cystic lesions in the abdomen and pelvis and, if pitfalls are to be avoided, is most effectively used in conjunction with other imaging sequences. It is important to recognize that the strength of the diffusion sensitizing gradient (b value) can and should be adjusted to ensure optimal evaluation of the body region or organ being imaged, and that more than one b value is necessary for tissue characterization. The success of lesion detection and characterization largely depends on the extent of tissue cellularity because increased cellularity is associated with impeded diffusion, as indicated by a reduction in the apparent diffusion coefficient. It is also important to recognize that certain normal tissues such as the endometrium are highly cellular and as such demonstrate restricted diffusion, which should not be misinterpreted as disease. Impeded diffusion can also be seen in highly viscous cystic lesions such as abscesses. Diffusion-weighted imaging is an evolving technology with the potential to improve tissue characterization when findings are interpreted in conjunction with findings obtained with other conventional MR imaging sequences. (C) RSNA, 2009 . radiographics.rsna.org