CAJ | 학술논문

目的：探讨脑发育性静脉异常(DVA)的 MRI表现,分析各成像序列的诊断价值。方法收集本院10例 DVA 病例,均行MRI平扫及3D-T1 WI增强扫描,其中6例行 MRA检查,4例行 MRV 检查,分别评价其对 DVA 的引流静脉、髓静脉的显示价值。结果10例均为单发病灶,幕上9例,幕下1例。MRI平扫6例DVA可见引流静脉,于 T2 WI呈流空信号；4例 DVA扩张的髓静脉有异常信号,其中3例表现为长T1长T2信号,不具有特征性。3D-T1 WI增强扫描10例DVA的引流静脉及扩张的髓静脉均明显强化并呈典型的“海蛇头”样改变,即多条髓静脉呈辐射状汇入粗大的引流静脉,显示率100%。MRA 与 MRV 检查仅部分病例可显示引流静脉,髓静脉均不能显示。结论 MRI 能明确诊断 DVA。MRI 平扫对 DVA 的显示率较低且不具特征性,3 D-T1 WI增强扫描是诊断DVA最准确、最敏感的检查方法,MRA与 MRV对DVA的诊断价值不大。
목적：탐토뇌발육성정맥이상(DVA)적 MRI표현,분석각성상서렬적진단개치。방법수집본원10례 DVA 병례,균행MRI평소급3D-T1 WI증강소묘,기중6례행 MRA검사,4례행 MRV 검사,분별평개기대 DVA 적인류정맥、수정맥적현시개치。결과10례균위단발병조,막상9례,막하1례。MRI평소6례DVA가견인류정맥,우 T2 WI정류공신호；4례 DVA확장적수정맥유이상신호,기중3례표현위장T1장T2신호,불구유특정성。3D-T1 WI증강소묘10례DVA적인류정맥급확장적수정맥균명현강화병정전형적“해사두”양개변,즉다조수정맥정복사상회입조대적인류정맥,현시솔100%。MRA 여 MRV 검사부부분병례가현시인류정맥,수정맥균불능현시。결론 MRI 능명학진단 DVA。MRI 평소대 DVA 적현시솔교저차불구특정성,3 D-T1 WI증강소묘시진단DVA최준학、최민감적검사방법,MRA여 MRV대DVA적진단개치불대。
Objective To study MRI manifestations of cerebral developmental venous anomaly (DVA)and to analyze the diagnos-tic value of different sequences.Methods Conventional MRI and contrast enhancement 3D-T1 WI were performed in all 10 patients who were collected in our hospital.Among the 10 cases,6 patients underwent MRA and 4 patients underwent MRV.The diaplay of the draining veins and medullary veins were assessed.Results All 10 cases were sporadic lesion,the lesions of 9 cases were located in supra tentorium and which of 1 case was located in infra tentorium.Abnormal signals without characteristics of draining veins in 6 cases and dilated medullary veins in 4 cases were found in conventional MRI,while 6 draining veins showed flow void signal on T2 WI and 3 of the 4 medullary veins showed hypointensity on T1 WI and hyperintensity on T2 WI.Contrast enhancement 3D-T1 WI displayed the markedly enhanced draining veins and dilated medullary veins in all 10 cases of DVA.Numerous medullary veins gath-ered together into large draining veins radially and flowed into superficial or deeper veins,so-called“caput medusae”appearance were found as the characteristics in all cases.MRA and MRV revealed draining veins only partially but no medullary veins.Conclusion MRI could diagnose DVA clearly,the sensitivity of detecting DVA on conventional MRI is low and there are no characteristics ap-pearances.Contrast enhancement 3D-T1 WI is the most accurate and sensitive method,MRA and MRV are not highly worthwhile for diagnosing DVA.