【摘要】 目的 评价MR相位对比电影(PC-cinc)技术用于判断梗阻性脑积水内镜下三脑室底造瘘术(ETV)术后瘘口脑脊液循环情况的可行性。方法 选取25例梗阻性脑积水患者于ETV前后分别行常规MR平扫和PC-cinc序列扫描,定性定量评估瘘口处脑脊液流动,并与25例正常志愿者进行对比分析。结果 术后1周23例患者瘘口均见明显脑脊液流动且1个心动周期内流动曲线与正常中脑导水管类似,2例患者造瘘口脑脊液流动阴性。测量瘘口处脑脊液向下及向上峰流速较正常中脑导水管减慢(P<0.05),而向下、向上流量及净流量均较正常中脑导水管明显增加(P<0.05)。6例患者术后1周脑室缩小,17例脑室维持原样,术后6个月随访其中14例脑室仍无明显缩小,2例术后脑室扩大。结论 PC-cinc MRI是观察ETV术后瘘口脑脊液循环情况的一种直观可靠的影像学方法。更多还原

【Abstract】 Objective To observe the feasibility of PC-cine MRI for estimating the cercbrospinal fluid circulation of fistula after endoscopic third vcntriculostomy( ETV) in obstructive hydroccphalus.Methods 25 cases with obstructive hydrocephalus were scanned with routine MR protocol and PC-cine sequence before and after ETV.Qualitative and quantitative evaluation of the ccrcbrospinal fluid flow through the fistula were performed and the results were compared with 25 cases of healthy volunteers.Results One week after operation,the ccrcbrospinal fluid flow through the fistula showed obviously positive in 23 patients,while negative in the other 2 patients,and the waveform was similar to that in the normal midbrain aqueduct.The outflow and inflow peak velocity of the ccrcbrospinal fluid through the fistula were lower than that in normal midbrain aqueduct(P<0.05),while the quantity of outflow,inflow and netflow were much highcr( P<0.05).6 patients showed ventricular narrowing one week after operation and 17 cases maintained the same finding.During follow-up of half year,the ventricular size still showed no obvious narrowing in 14 patients.Ventricular expanding was observed in 2 post-operative patients.Conclusion PC-cine MRI can provide intuitive and reliable evidences in evaluation of ETV for obstructive hydroccphalus.更多还原