CerebralVenousThrombosisBarbaraSimons,GeertLycklamaaNijeholtandRobinSmithuisRadiologydepartmentoftheMedicalCentreHaaglandenintheHagueandtheRijnlandhospitalinLeiderdorp,theNetherlands脑静脉性栓塞形成•Introduction•Whentothinkofvenousthrombosis•Denseclotsign•Emptydeltasign•AbsenceofnormalflowvoidonMR•Venousinfarction•Imaginginsuspectedthrombosis•CT-venography•MR-venography•DSA•PitfallsinCT•ArachnoidGranulations•Mimickofdenseclotsign•Pseudoemptydeltasign•Wrongbolustiming•PitfallsinMRI•Hypoplastictransversesinus•Lowsignalintensityinthrombus•Flowvoidoncontrast-enhancedMR•Chronicduralsinusthrombosisandrelatedsyndromes•DAVF•ThrombosisandincreasedCSFpressure•VenousterritoriesPublicationdateOctober21,2010Cerebralvenousthrombosisisanimportantcauseofstrokeespeciallyinchildrenandyoungadults.Itismorecommonthanpreviouslythoughtandfrequentlymissedoninitialimaging.Itisadifficultdiagnosisbecauseofitsnonspecificclinicalpresentationandsubtleimagingfindings.Inthisarticlewewillfocuson:•Findingsonroutineimagingthatshouldmakeyouthinkofunsuspectedvenousthrombosis.•Howtoimagepatientsinsuspectedvenousthrombosis.•Pitfalls.此时应想到静脉栓塞可能•致密斑块征•空三角征•MR上正常流空征消失•静脉性脑梗塞疑似此病的成像方法•CT静脉成像•MR静脉成像•DSACT陷阱•蛛网膜颗粒•酷似致密凝块征•假性空三角征•错误的团注时间MRI陷阱•横窦发育不良•血栓内低信号强度•MR对比增强时的流空硬膜窦栓塞临床与相关综合征•DAWF（硬膜动静脉瘘）•栓塞和脑脊液压力增高静脉分布图静脉性脑梗塞是中风的重要原因，尤其是在儿童或年轻人。它比以前更常见而且常常在最初的成像中漏诊由于临床上缺少特征而且影像所见微妙，因而诊断困难这里主要讨论的内容：*提示可疑静脉性脑梗塞的常规影像学表现*疑为静脉性脑梗塞如何进一步进行影像学检查*陷阱Cerebralvenousthrombosisislocatedindescendingorderinthefollowingvenousstructures:•Majorduralsinuses:Superiorsagittalsinus,transverse,straightandsigmoidsinuses.•Corticalveins:•VeinofLabbe,whichdrainsthetemporallobe.•VeinofTrolard,whichisthelargestcorticalveinthatdrainsintothesuperiors...
