Title: Early MR Diagnosis of Cerebral Venous Sinus Thrombosis and Pathophysiological Changes
Abstract: Objective:To study the MR findings of cerebral venous sinus thrombosis and pathophysiological changes for the early diagnosis.Methods:MR findings of 11 cases of dural sinus thrombosis diagnosed by clinic and imaging were reviewed retrospectively,including six women and five men,mean age 31 years.All cases were underwent non-enhanced MRI,enhanced MRI and MR venography.Additionaly,4 patients were performed CT and 3 were underwent DSA.Results:CVST involved superior sagittal sinus in 5 cases,transverse sinus 1,sigmoid sinus 1,straight sinus 1,superior sagittal sinus and transverse sinus and sigmoid sinus 2,transverse sinus and sigmoid sinus1.Direct signs of CVST:3 cases of acute thrombus showed isointensity or iso- to hyperintensity on T1WI and hypointensity on T2WI with a hyperintensity ring was surrounded with the thrombus, which is the thickening dura.8 cases of subacute thrombus showed hyperintensity on T1WI and T2WI.The involved sinuses were demonstrated empty delta sign or sign on enhanced MRI.MR venography displayed the loss of the normal flow signal,as nonvisulization or the filling defect sign in the involved cerebral venous sinuses.The secondary cerebral damages included cerebral swelling,infarct and hemorrhage.Conclusion:MR examination plays an important role in the early diagnosis of CVST.For the early diagnosis of acute thrombus showed hypointensity on T2WI,the sign of a hyperintensity ring around the hypointensity thrombus is very helpful,and the further enhanced MRI and MR venography can help the final diagnosis earlier.
Publication Year: 2007
Publication Date: 2007-01-01
Language: en
Type: article
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