Intracranial Dural Arteriovenous Fistulas: Evaluation with 3-T Four-dimensional MR Angiography Using Arterial Spin Labeling
Intracranial Dural Arteriovenous Fistulas: Evaluation with 3-T Four-dimensional MR Angiography Using Arterial Spin Labeling
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DOI：
10.1148/radiol.13122670
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发表时间：
2014-04-01
期刊：
影响因子：
19.7
通讯作者：
Yamashita, Yasuyuki
中科院分区：
文献类型：
--
作者：
Iryo, Yasuhiko;Hirai, Toshinori;Yamashita, Yasuyuki
目的：评估是否3-T四维（4D）动脉自旋标记（ASL）为基础的磁共振（MR）血管造影是有用的颅内硬脑膜动静脉瘘（AVFs.Materials和方法）患者的分流病变的评价机构审查委员会的批准和事先书面知情同意，从所有患者。9例颅内硬脑膜AVF患者（7例男性，2例女性;年龄范围：52-77岁;平均年龄：63岁）在3 T下接受了4D ASL MR血管造影和数字减影血管造影（DSA）。自旋标记与流动敏感的交替反转恢复与Look-Rank采样。以300毫秒的间隔，获得了空间分辨率为0.5 x 0.5 x 0.6 mm（3）的7张动态图像。4D ASL MR血管造影和DSA图像由两组各自独立的阅片员读取。Interobserver和intermodalities协议进行了评估与kappa statistics.Results：在所有的4D ASL MR血管造影图像，主要颅内动脉显示在300毫秒的时间分辨率。瘘口部位的观察者间一致性极佳（kappa = 1.00; 95%置信区间[ CI]：1.00，1.00），主要供血动脉的一致性中等（kappa = 0.53; 95% CI：0.08，0.98），静脉引流良好（kappa = 0.77; 95% CI：0.35，1.00）。瘘管部位和静脉引流的通道间一致性非常好（kappa = 1.00; 95% CI：1.00，1.00），主要供血动脉良好（kappa = 0.80; 95% CI：0.58，1.00）。3-T 4D ASL MR血管造影和DSA结果之间的良好至极好的一致性表明，3-T 4D ASL MR血管造影和DSA结果之间的良好至极好的一致性。T4 D ASL MR血管成像是评价颅内硬脑膜动静脉瘘的有效工具。(C)RSNA，2013年
Purpose: To evaluate whether 3-T four-dimensional (4D) arterial spin-labeling (ASL)-based magnetic resonance (MR) angiography is useful for the evaluation of shunt lesions in patients with intracranial dural arteriovenous fistulas (AVFs).Materials and Methods: Institutional review board approval and prior written informed consent from all patients were obtained. Nine patients with intracranial dural AVF (seven men, two women; age range, 52-77 years; mean age, 63 years) underwent 4D ASL MR angiography at 3 T and digital subtraction angiography (DSA). Spin tagging was with flow-sensitive alternating inversion recovery with Look-Locker sampling. At 300-millisecond intervals, seven dynamic images with a spatial resolution of 0.5 x 0.5 x 0.5 x 0.6 mm(3) were obtained. The 4D ASL MR angiographic and DSA images were read by two sets of two independent readers each. Interobserver and intermodality agreement was assessed with the kappa statistic.Results: On all 4D ASL MR angiographic images, the major intracranial arteries were demonstrated at a temporal resolution of 300 milliseconds. Interobserver agreement was excellent for the fistula site (kappa = 1.00; 95% confidence interval [ CI]: 1.00, 1.00), moderate for the main arterial feeders (kappa = 0.53; 95% CI: 0.08, 0.98), and good for venous drainage (kappa = 0.77; 95% CI: 0.35, 1.00). Intermodality agreement was excellent for the fistula site and venous drainage (kappa = 1.00; 95% CI: 1.00, 1.00) and good for the main arterial feeders (kappa = 0.80; 95% CI: 0.58, 1.00).Conclusion: The good-to-excellent agreement between 3-T 4D ASL MR angiographic and DSA findings suggests that 3-T 4D ASL MR angiography is a useful tool for the evaluation of intracranial dural AVFs. (C) RSNA, 2013