中枢神经系统影像学诊断.ppt

中枢神经系统影像学诊断;中枢神经系统;检验措施

Modalities;检验措施Modalities;检验措施Modalities;检验措施

Modalities;检验措施Modalities;DSAMRA;TranscranialDoppler，TCD;CTangiography;检验措施;DWIincerebralinfarct;;BOLD

toshowthevisualcortex;检验措施;SPECT;SinglepixelMRS;正常影像解剖

normalimaginganatomy;CT扫描技术及正常影像解剖

techniqueandnormalimaginganatomy;;正常影像解剖

normalimaginganatomy;T1WI

axial;T2WI

axial;T1WI

coronal;基本病变体现

basicimagingsign;;;基本病变体现

basicimagingsign;基本病变体现

basicimagingsign;等密度

isodensity

低密度水肿

Lowdensity

占位效应;;脑水肿cerebraledema;脑积水hydrocephalus;;脑萎缩cerebralatrophy;增强扫描特征;;颅骨变化;giantcellreparativegranuloma;MRI基本病变体现

basicMRIsign;MRI基本病变体现;;MRI基本病变体现;脑内血肿

(intracerebralhematoma)

;MRI分期staging

超急性期（Hyperacutehematoma）＜6小时

T1WI等信号，T2WI为等信号

急性期（Acutehematoma）7小时～3天

T1WI呈等信号，血肿内缘可见低信号强度旳硬膜，T2WI呈低信号

亚急性期和慢性期（Subacutehematoma）3天～4周

高信号(metahemoglobin)

囊变期（Remotehematoma）≥4周

液体信号

周围有低信号（hemosiderin)

;Theevolutionofhematoma;Hyperacutehematoma;CT;常见疾病诊疗

commondiseaseofCNS;脑外伤traumaofbrain;脑外伤

traumaofbrain;脑挫裂伤;脑挫裂伤;Thereisafocalareaofhaemorrhagiccontusionintherightfrontallobe,withsurroundinglowdensityduetoinfarctionoroedema.Thisisafrequentlocationforacontrecoupinjuryfollowingablowtothebackofthehead.;;弥漫性轴索损伤

diffuseaxonalinjury,DAI;弥漫性轴索损伤

diffuseaxonalinjury;硬膜下血肿

subduralhematoma;硬膜下血肿

subduralhematoma;硬膜外血肿epiduralhematoma;硬膜外血肿epiduralhematoma;蛛网膜下腔出血

subarachnoidhemorrhage;蛛网膜下腔出血

subarachnoidhemorrhage;蛛网膜下腔出血;脑血管病cerebrovasculardisease;脑出血intracranialhemorrhage;高血压性脑出血

hypertensiveintrcerebralhemorrhage;脑出血intracranialhemorrhage;脑梗死

cerebralinfarction;脑梗死

cerebralinfarction;脑梗死;脑梗死CT演变???程;脑梗死;T1WIT2WIFLAIR;MultiphasicperfusionCTobtained3hoursafterthesuddenonsetofrighthemiparesisandaphasiaina76-year-oldwoman.

F:2daysfollow-up;;血管畸形

vascularmalformation;动静脉畸形(AVM);动静脉畸形（AVM）;Male,48y