Objective: To evaluate the diagnostic performance of the combination of arterial spin labeling (ASL) and time of flight MR angiography (TOF MRA) for intracranial arteriovenous shunt (AVS) detection. Methods: A total of 39 patients with known or suspected with cerebrovascular malformations underwent digital subtraction angiography (DSA) and ASL/TOF MRA imaging in Department of neurosurgery and radiology and nuclear medicine, Xuanwu Hospital from May 1, 2020 to October 31, 2020 were retrospectively analyzed. Patients were divided into either acute cerebral hemorrhage group (n=13) or non-acute cerebral hemorrhage group (n=26) based on the signs of bleeding on imaging findings. According to history of treatment, those patients were divided into treated (n=11) and untreated (n=28) subgroups. The determination of the presence of AVS on images was judged by two radiologists in a blinded and randomized order fashion. The diagnostic performance of ASL or TOF MRA for AVS were evaluated in overall, acute cerebral hemorrhage subgroup and treated subgroup by using the area under receiver operating curve (AUC) with DSA as the reference standard, respectively. The κ coefficients were calculated to determine the interobserver agreement. Results: Among 39 patients, 29 patients were confirmed with AVS by DSA while 10 patients with no AVS. Interobserver agreement was good-excellent (κ=0.83-1.00). In patients with AVM, the detection rates for AVS of ASL or TOF MRA were 93.1% and 86.2% respectively, while the detection rates of the combination of ASL and TOF MRA were 100%. The AUC of ASL, TOF MRA and their combination for diagnosis of AVS in overall were 0.966 (95%CI: 0.909-1.00), 0.914 (95%CI: 0.825-1.00) and 0.983 (95%CI:0.943-1.00), respectively. The AUC of ASL, TOF MRA and their combination for AVS in acute cerebral hemorrhage subgroup were 1(95%CI:1.00-1.00), 0.833(95%CI:0.611-1.00), 1(95%CI:1.00-1.00), respectively. Conclusion: Combination of ASL and TOF MRA can be a non-invasive thchnique for the detection of AVS.
目的： 探讨动脉自旋标记（ASL）和时间飞跃法磁共振血管造影（TOF MRA）联合检测颅内动静脉分流的准确性。 方法： 回顾性分析从2020年5月1日至10月31日在宣武医院神经外科及放射及核医学科接受数字减影血管造影（DSA）和ASL、TOF MRA的39例已知或疑似脑血管畸形的患者资料，其中男18例，女21例，年龄5~64（33±18）岁。根据患者影像检查的出血表现，分为急性脑出血（n=13）与非急性脑出血亚组（n=26）；并根据患者临床治疗史，分为治疗（n=11）与未治疗亚组（n=28）。然后分别由2名放射科医生以随机顺序盲法阅片，判断是否存在动静脉分流。以DSA为参考标准，以受试者工作特征曲线下面积（AUC）分别计算ASL或TOF MRA检测总体、急性脑出血亚组及治疗后亚组中动静脉分流的准确性。κ系数确定观察者间的一致性。 结果： 39例患者中，DSA诊断动静脉畸形患者29例，未发现动静脉分流者10例。ASL与TOF MRA阅片的观察者间一致性良好-非常好（κ= 0.83~1.00）。在29例动静脉畸形患者中，对动静脉分流的检出率ASL为93.1%（27/29），TOF MRA为86.2%（25/29），而ASL与TOF MRA联合达到了100%。ASL、TOF MRA及联合两者诊断总体动静脉分流的AUC分别为0.966（95%CI：0.909~1.00）、0.914（95%CI：0.825~1.00）、0.983（95%CI：0.943~1.00），在急性脑出血亚组中诊断动静脉分流的AUC分别为1（95%CI：1.00~1.00）、0.833（95%CI：0.611~1.00）、1（95%CI：1.00~1.00）。 结论： ASL与TOF MRA联合是一种无创的检测动静脉分流方法。.