腦腫瘤的磁共振診斷課件

腦腫瘤的磁共振診斷廣西醫(yī)科大學(xué)第一附屬醫(yī)院放射科李茂腦腫瘤的磁共振診斷1內(nèi)容腦磁共振成像正常信號(hào)與異常信號(hào)腦腫瘤基本磁共振信號(hào)常見(jiàn)腦腫瘤磁共振表現(xiàn):星形細(xì)胞瘤腦膜瘤,垂體瘤,顱咽管瘤,松果體瘤聽(tīng)神經(jīng)瘤,腦轉(zhuǎn)移瘤內(nèi)容2目的要求·了解腦磁共振成像正常信號(hào)與異常信號(hào)熟悉腦腫瘤基本磁共振信號(hào)掌握常見(jiàn)腦腫瘤磁共振表現(xiàn):星形細(xì)胞瘤,腦膜瘤,垂體瘤,顱咽管瘤,松果體瘤,聽(tīng)神經(jīng)瘤,腦轉(zhuǎn)移瘤目的要求3腦正常磁共振信號(hào)腦質(zhì)與腦脊液:T1:灰質(zhì)(皮質(zhì))呈灰暗,白質(zhì)(髓質(zhì))呈灰白,CSF信號(hào)最低-黑色T2灰質(zhì)呈灰白,白質(zhì)呈灰暗,CSF信號(hào)最高-白色(bright·FLAIR:灰質(zhì)呈灰白,白質(zhì)呈灰暗,CSF信號(hào)黑色腦正常磁共振信號(hào)4腦正常磁共振圖像腦正常磁共振圖像5腦異常磁共振信號(hào)T1高信號(hào):脂肪、亞急性血腫、蛋白質(zhì)巧2高信號(hào):炎癥、水腫、囊變、囊腫亞急性血腫;(稍高信號(hào):脂肪、蛋白質(zhì))T1低信號(hào):炎癥、水腫、囊變、囊腫鈣化、含鐵血黃素Ⅳ2低信號(hào):骨、鈣化、含鐵血黃素、性出血腦異常磁共振信號(hào)6腦腫瘤的定位腦外腫瘤特點(diǎn):寬基底,緊貼顱壁或硬腦膜;鄰近顱骨增生或破壞腦質(zhì)受壓內(nèi)移;·鄰近蛛網(wǎng)膜下腔增寬;腦腫瘤的定位7腫瘤的信號(hào)特點(diǎn)腫瘤的基本信號(hào):T1低信號(hào),T2高信號(hào),如大多數(shù)星形細(xì)胞瘤;腫瘤的組織成分特殊,信號(hào)特殊;T1高信號(hào),如顱咽管瘤,脂肪瘤,膠樣囊腫,出血性腫瘤,黑色素瘤腦轉(zhuǎn)移等2.T2等信號(hào),如腦膜瘤,淋巴瘤,成人髓母細(xì)胞瘤,少突神經(jīng)膠質(zhì)瘤、結(jié)腸癌或前列腺癌腦轉(zhuǎn)移等腫瘤的信號(hào)特點(diǎn)8腫瘤信號(hào)的均勻度腫瘤囊變、壞死、出血、化鈣、含脂肪或蛋白質(zhì)一表現(xiàn)混雜信號(hào)。囊變或壞死,T1低信號(hào)中有更低信號(hào)區(qū)T2高信號(hào)中有更高信號(hào)區(qū)腫瘤信號(hào)的均勻度9腫瘤強(qiáng)化強(qiáng)化原理:血腦屏障破壞、腫瘤血管強(qiáng)化類型:片狀、結(jié)節(jié)或塊狀、環(huán)狀或花環(huán)狀、環(huán)結(jié)節(jié)強(qiáng)化腫瘤強(qiáng)化10腦腫瘤的磁共振診斷課件11腦腫瘤的磁共振診斷課件12腦腫瘤的磁共振診斷課件13腦腫瘤的磁共振診斷課件14腦腫瘤的磁共振診斷課件15腦腫瘤的磁共振診斷課件16腦腫瘤的磁共振診斷課件17腦腫瘤的磁共振診斷課件18腦腫瘤的磁共振診斷課件19腦腫瘤的磁共振診斷課件20腦腫瘤的磁共振診斷課件21腦腫瘤的磁共振診斷課件22腦腫瘤的磁共振診斷課件23腦腫瘤的磁共振診斷課件24腦腫瘤的磁共振診斷課件25腦腫瘤的磁共振診斷課件26腦腫瘤的磁共振診斷課件27腦腫瘤的磁共振診斷課件28腦腫瘤的磁共振診斷課件29腦腫瘤的磁共振診斷課件30腦腫瘤的磁共振診斷課件31腦腫瘤的磁共振診斷課件32腦腫瘤的磁共振診斷課件33腦腫瘤的磁共振診斷課件34腦腫瘤的磁共振診斷課件35腦腫瘤的磁共振診斷課件36腦腫瘤的磁共振診斷課件37腦腫瘤的磁共振診斷課件38腦腫瘤的磁共振診斷課件39腦腫瘤的磁共振診斷課件40腦腫瘤的磁共振診斷課件41腦腫瘤的磁共振診斷課件42腦腫瘤的磁共振診斷課件43腦腫瘤的磁共振診斷課件44腦腫瘤的磁共振診斷課件45腦腫瘤的磁共振診斷課件46腦腫瘤的磁共振診斷課件47腦腫瘤的磁共振診斷課件48腦腫瘤的磁共振診斷課件49腦腫瘤的磁共振診斷課件50腦腫瘤的磁共振診斷課件51腦腫瘤的磁共振診斷課件52腦腫瘤的磁共振診斷課件53腦腫瘤的磁共振診斷課件54腦腫瘤的磁共振診斷課件55腦腫瘤的磁共振診斷課件56腦腫瘤的磁共振診斷課件57腦腫瘤的磁共振診斷課件58腦腫瘤的磁共振診斷課件59腦腫瘤的磁共振診斷課件60腦腫瘤的磁共振診斷課件61腦腫瘤的磁共振診斷課件62腦腫瘤的磁共振診斷課件63腦腫瘤的磁共振診斷課件64腦腫瘤的磁共振診斷課件65腦腫瘤的磁共振診斷課件66腦腫瘤的磁共振診斷課件67腦腫瘤的磁共振診斷課件68腦腫瘤的磁共振診斷課件69腦腫瘤的磁共振診斷課件70腦腫瘤的磁共振診斷課件71腦腫瘤的磁共振診斷課件72腦腫瘤的磁共振診斷課件73腦腫瘤的磁共振診斷課件74腦腫瘤的磁共振診斷課件75腦腫瘤的磁共振診斷課件76腦腫瘤的磁共振診斷課件77腦腫瘤的磁共振診斷課件78腦腫瘤的磁共振診斷課件79腦腫瘤的磁共振診斷課件80腦腫瘤的磁共振診斷課件81腦腫瘤的磁共振診斷課件82腦腫瘤的