硬膜外血肿的ct诊断ppt

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1、硬膜外血肿的影像诊断ImagingDiagnosisofEpiduralHematoma昆明医学院第三附属医院放射科谭静目的（objective）1、掌握硬膜外血肿的CT及MRI诊断。MastertheCTandMRIdiagnosisoftheEpiduralHematoma.2、掌握硬膜外血肿影像检查方法的选择。MasterthechoiceofimagingmethodinEpiduralHematoma.一、定义（Definition）一、定义（Definition）颅内出血积聚于颅骨与硬

2、膜之间称为硬膜外血肿。Epiduralhematomaisanextrabloodcollection,locatedbetweentheduraandtheinnertableoftheskull.硬膜颅骨血肿二、临床表现（ClinicalFindings）二、临床表现（ClinicalFindings）临床出现头痛、呕吐、昏迷等症状，严重者出现脑疝。Clinicalmanifestationsincludeheadache、vomit、coma，inseverecaseappearhernia

3、ofbrain.三、影像诊断（ImagingDiagnosis)X线诊断CT诊断MRI诊断1、X线诊断（X-rayDiagnosis)仅能显示颅骨骨折，诊断价值有限。血肿脑颅骨2、CT及MRI诊断(CTandMRIDiagnosis)2、CT及MRI诊断(CTandMRIDiagnosis)双凸形血肿biconvexhematoma双凸形血肿BiconvexHematomaCT双凸形血肿biconvexhematomaMRIT1WI2、CT及MRI诊断(CTandMRIDiagnosis)双凸形血

4、肿BiconvexHematoma颅骨骨折SkullFracture脑窗CerebralwindowCT颅骨骨折SkullFracture骨窗BoneWindowCT颅骨骨折SkullFracture脑窗CerebralWindow骨窗BoneWindowCT2、CT及MRI诊断(CTandMRIDiagnosis)双凸形血肿BiconvexHematoma颅骨骨折SkullFracture占位效应MassEffect占位效应MassEffectCT占位效应MassEffectMRIT1WI冠状2

5、、CT及MRI诊断(CTandMRIDiagnosis)双凸形血肿BiconvexHematoma颅骨骨折SkullFracture占位效应MassEffect头皮软组织肿胀ScalpSoftTissueSwelling头皮软组织肿胀ScalpSoftTissueSwellingCT头皮软组织肿胀ScalpSoftTissueSwellingMRIT2WI矢状我们还能为临床提供更多的诊断信息吗？答案是肯定的！血肿在不同时期的表现CTT1WIT2WI急性期AcutePhase高密度HighDensi

6、ty等信号Equisignal低信号LowSignal亚急性期SubacutePhase等或混杂密度EquidensityMixedDensity逐渐增高信号GraduallyIncreasesSignal逐渐增高信号GraduallyIncreasesSignal慢性期ChronicPhase低密度LowDensity低信号LowSignal高信号HighSignal急性期血肿CTMRIT1WIMRIT2WI亚急性期血肿CTMRIT1WIMRIT2WI慢性期血肿CTMRIT1WIMRIT2WI血

7、肿在不同时期的表现CTT1WIT2WI急性期AcutePhase高密度HighDensity等信号Equisignal低信号LowSignal亚急性期SubacutePhase等或混杂密度EquidensityMixedDensity逐渐增高信号GraduallyIncreasesSignal逐渐增高信号GraduallyIncreasesSignal慢性期ChronicPhase低密度LowDensity低信号LowSignal高信号HighSignal3、影像方法的选择(choiceofima

8、gingmodalities)CT是最主要的检查方法。对于亚急性期和慢性期的血肿，MRI的显示优于CT。CTisthemaininspectionmethod,MRIshowedbetterthanCTinhematomainsubacutephaseandchronicphase.MRIDWI四、鉴别诊断（DifferentialDiagnosis）与硬膜下血肿鉴别血肿的形状。(Theshapeofthehematoma.)是否跨越中线或颅缝。(Whetherthecranial