DWI序列的基本原理是什么?
扩散加权成像主要是探测什么的扩散运动?
DWI序列对诊断意义重大,具体是什么?
DWI序列判读,一直有些理解不透彻。今日借梅斯医学里的课件学习一下。
原理部分在目前需要和理解范围之外,就删掉了,网盘里保存完整版的。这里只留精华实用内容。
大:细胞毒性水肿:神经元/胶质细胞毒性水肿-急性脑梗死、脑炎、轴索水肿(弥漫性轴索损伤ADI)、神经髓鞘细胞水肿-早期多发硬化、进行性多灶性脑白质病。
多:高细胞密度和/或小细胞外间隙-肿瘤:胶质母细胞瘤和转移瘤、淋巴瘤;伴大量肿瘤细胞浸润的瘤周水肿,胶原细胞增多。
粘:高粘度—脓肿(0.3-0.9×10-3mm2/s)、表皮样囊肿(胆脂瘤)。
透:长T2组织-T2透过效应。
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