颅脑常见疾病MRI表现课件

常见脑血管疾病MR表现常见脑血管疾病MR表现1内容:简述几种信号异常的病理生理基础二、脑血管疾病的MR表现1、脑梗塞、脑出血。内容:2简述几种信号异常的病理生理基础简述几种信号异常的3水肿脑水肿分为三种:1.血管源性水肿:最常见、自由水增多为主结合水为辅、脑白质2细胞毒素水肿:结合水为主、脑白质和脑灰质同时受累;3.间质性水肿:结合水为主、脑室周围脑白质水肿4出血急性血肿(0~2天):T1Wl无异常,T2Wl中心部低信号(去氧血红蛋白的顺磁亚急性期早期(3~5天):T1W血肿外围高信号,2W无高信号(细胞内正铁血红蛋白有较强顺磁亚急性期中期(6~8天T1W|高信号由血肿外W高信号(细胞外正铁血红蛋白具有明显延长T2时间后期(10~14天肿周围低信号环2W明显(血肿周围的巨噬细胞内含大量含铁出血5颅脑常见疾病MRI表现课件6颅脑常见疾病MRI表现课件7颅脑常见疾病MRI表现课件8颅脑常见疾病MRI表现课件9颅脑常见疾病MRI表现课件10颅脑常见疾病MRI表现课件11颅脑常见疾病MRI表现课件12颅脑常见疾病MRI表现课件13颅脑常见疾病MRI表现课件14颅脑常见疾病MRI表现课件15颅脑常见疾病MRI表现课件16颅脑常见疾病MRI表现课件17颅脑常见疾病MRI表现课件18颅脑常见疾病MRI表现课件19颅脑常见疾病MRI表现课件20颅脑常见疾病MRI表现课件21颅脑常见疾病MRI表现课件22颅脑常见疾病MRI表现课件23颅脑常见疾病MRI表现课件24颅脑常见疾病MRI表现课件25颅脑常见疾病MRI表现课件26颅脑常见疾病MRI表现课件27颅脑常见疾病MRI表现课件28颅脑常见疾病MRI表现课件29颅脑常见疾病MRI表现课件30颅脑常见疾病MRI表现课件31颅脑常见疾病MRI表现课件32颅脑常见疾病MRI表现课件33颅脑常见疾病MRI表现课件34颅脑常见疾病MRI表现课件35颅脑常见疾病MRI表现课件36颅脑常见疾病MRI表现课件37颅脑常见疾病MRI表现课件38颅脑常见疾病MRI表现课件39颅脑常见疾病MRI表现课件40颅脑常见疾病MRI表现课件41颅脑常见疾病MRI表现课件42颅脑常见疾病MRI表现课件43颅脑常见疾病MRI表现课件44颅脑常见疾病MRI表现课件45颅脑常见疾病MRI表现课件46颅脑常见疾病MRI表现课件47颅脑常见疾病MRI表现课件48颅脑常见疾病MRI表现课件49颅脑常见疾病MRI表现课件50颅脑常见疾病MRI表现课件51颅脑常见疾病MRI表现课件52颅脑常见疾病MRI表现课件53颅脑常见疾病MRI表现课件54颅脑常见疾病MRI表现课件55颅脑常见疾病MRI表现课件56颅脑常见疾病MRI表现课件57颅脑常见疾病MRI表现课件58颅脑常见疾病MRI表现课件59颅脑常见疾病MRI表现课件60颅脑常见疾病MRI表现课件61颅脑常见疾病MRI表现课件62颅脑常见疾病MRI表现课件63颅脑常见疾病MRI表现课件64颅脑常见疾病MRI表现课件65颅脑常见疾病MRI表现课件66颅脑常见疾病MRI表现课件67颅脑常见疾病MRI表现课件68颅脑常见疾病MRI表现课件69颅脑常见疾病MRI表现课件70颅脑常见疾病MRI表现课件71颅脑常见疾病MRI表现课件72颅脑常见疾病MRI表现课件73颅脑常见疾病MRI表现课件74常见脑血管疾病MR表现常见脑血管疾病MR表现75内容:简述几种信号异常的病理生理基础二、脑血管疾病的MR表现1、脑梗塞、脑出血。内容:76简述几种信号异常的病理生理基础简述几种信号异常的77水肿脑水肿分为三种:1.血管源性水肿:最常见、自由水增多为主结合水为辅、脑白质2细胞毒素水肿:结合水为主、脑白质和脑灰质同时受累;3.间质性水肿:结合水为主、脑室周围脑白质水肿78出血急性血肿(0~2天):T1Wl无异常,T2Wl中心部低信号(去氧血红蛋白的顺磁亚急性期早期(3~5天):T1W血肿外围高信号,2W无高信号(细胞内正铁血红蛋白有较强顺磁亚急性期中期(6~8天T1W|高信号由血肿外W高信号(细胞外正铁血红蛋白具有明显延长T2时间后期(10~14天肿周围低信号环2W明显(血肿周围的巨噬细胞内含大量含铁出血79颅脑常见疾病MRI表现课件80颅脑常见疾病MRI表现课件81颅脑常见疾病MRI表现课件82颅脑常见疾病MRI表现课件83颅脑常见疾病MRI表现课件84颅脑常见疾病MRI表现课件85颅脑常见疾病MRI表现课件86颅脑常见疾病MRI表现课件87颅脑常见疾病MRI表现课件88颅脑常见疾病MRI表现课件89颅脑常见疾病MRI表现课件90颅脑常见疾病MRI表现课件91颅脑常见疾病MRI表现课件92颅脑常见疾病MRI表现课件93颅脑常见疾病MRI表现课件94颅脑常见疾病MRI表现课件95颅脑常见疾病MRI表现课件96颅脑常见疾病MRI表现课件97颅脑常见疾病MRI表现课件98颅脑常见疾病MRI表现课件99颅脑常见疾病MRI表现课件100颅脑常见疾病MRI表现课件101颅脑常见疾病MRI表现课件102颅脑常见疾病MRI表现课件103颅脑常见疾病MRI表现课件104颅脑常见疾病MRI表现课件105颅脑常见疾病MRI表现课件106颅脑常见疾病MRI表现课件107颅脑常见疾病MRI表现课件108颅脑常见疾病MRI表现课件109颅脑常见疾病MRI表现课件110颅脑常见疾病MRI表现课件111颅脑常见疾病MRI表现课件112颅脑常见疾病MRI表现课件113颅脑常见疾病MRI表现课件114颅脑常见疾病MRI表现课件115颅脑常见疾病MRI表现课件116颅脑常见疾病MRI表现课件117颅脑常见疾病MRI表现课件118颅脑常见疾病MRI表现课件119颅脑常见疾病MRI表现课件120颅脑常见疾病MRI表现课件121颅脑常见疾病MRI表现课件122颅脑常见疾病MRI表现课件123颅脑常见疾病MRI表现课件124颅脑常见疾病MRI表现课件125颅脑常见疾病MRI表现课件126颅脑常见疾病MRI表现课件127颅脑常见疾病MRI表现课件128颅脑常见疾病MRI表现课件129颅脑常见疾病MRI表现课件130颅脑常见疾病MRI表现课件131颅脑常见疾病MRI表现课件132颅脑常见疾病MRI表现课件133颅脑常见疾病MRI表现课件134颅脑常见疾病MRI表现课件135颅脑常见疾病MRI表现课件136颅脑常见疾病MRI表现课件137颅脑常见疾病MRI表现课件138颅脑常见疾病MRI表现课件139颅脑常见