PURPOSE MR angiography using the silent MR angiography algorithm (silent MRA), which combines arterial spin labeling and an ultrashort time echo, has not been used for the evaluation of cerebral arteriovenous malformations (CAVMs). We aimed to determine the usefulness of silent MRA for the evaluation of CAVMs. METHODS Twenty-nine CAVMs of 28 consecutive patients diagnosed by 4D CT angiography or digital subtraction angiography, who underwent both time-of-flight (TOF) MRA and silent MRA, were enrolled. Two observers independently assessed the TOF-MRA and silent MRA images of CAVMs. Micro AVM was defined as AVM with a nidus diameter less than 10 mm. The detection rate, visualization of the components, and accuracy of Spetzler-Martin grade were evaluated with statistical software R. RESULTS For all 29 CAVMs, 23 (79%) lesions were detected for TOF-MRA and all for silent MRA. Of 10 micro AVMs, only 4 (40%) lesions were detectable on TOF-MRA and all (100%) on silent MRA. The visibility of the nidus and drainer was significantly better for silent MRA than TOF-MRA (p < 0.001), while there was no significant difference in the feeder between the two sequences. The accuracy rates of the Spetzler-Martin grade for the TOF and silent MRA were 38% (11/29) and 79.3% (23/29), respectively (p < 0.001). CONCLUSIONS Silent MRA is useful for evaluating CAVM components and detecting micro AVM.

中文翻译：

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沉默MRA：动脉自旋标记磁共振血管造影，超短时间回波评估脑动静脉畸形。

用途MR血管造影使用无声MR血管造影算法（沉默MRA），结合了动脉旋转标记和超短时间回声，尚未用于评估脑动静脉畸形（CAVM）。我们旨在确定静默MRA对CAVM评估的有用性。方法纳入28位连续4D CT血管造影或数字减影血管造影诊断为CAF的患者，这些患者均接受了飞行时间（TOF）MRA和静默MRA检查。两名观察员独立评估了CAVM的TOF-MRA和无声MRA图像。微型AVM定义为nidus直径小于10 mm的AVM。使用统计软件R对Spetzler-Martin等级的检出率，组分的可视化和准确性进行了评估。结果对于所有29个CAVM，TOF-MRA检出23个（79％）病变，沉默MRA全部检出。在10个微型AVM中，在TOF-MRA上只能检测到4个（40％）病变，而在静默MRA上则可以检测到所有（100％）病变。沉默MRA的nidus和drainer的可见度明显优于TOF-MRA（p <0.001），而两个序列之间的饲养层没有显着差异。Spetzler-Martin等级的TOF和无声MRA的准确率分别为38％（11/29）和79.3％（23/29）（p <0.001）。结论静默MRA可用于评估CAVM组件和检测微型AVM。而两个序列之间的喂食器没有显着差异。Spetzler-Martin等级的TOF和无声MRA的准确率分别为38％（11/29）和79.3％（23/29）（p <0.001）。结论静默MRA可用于评估CAVM组件和检测微型AVM。而两个序列之间的喂食器没有显着差异。Spetzler-Martin等级的TOF和无声MRA的准确率分别为38％（11/29）和79.3％（23/29）（p <0.001）。结论静默MRA可用于评估CAVM组件和检测微型AVM。