Aneurysm outflow angle at MRA as discriminant for accurate diagnosis and differentiation between small sidewall cerebral aneurysms and infundibula
Aneurysm outflow angle at MRA as discriminant for accurate diagnosis and differentiation between small sidewall cerebral aneurysms and infundibula
复制标题
MRA 的动脉瘤流出角可作为准确诊断和区分小侧壁脑动脉瘤和漏斗部的判别标准
DOI：
10.1136/neurintsurg-2016-012425
复制
发表时间：
2017-06-01
影响因子：
4.8
通讯作者：
Gu, Bin-Xian
中科院分区：
文献类型：
--
作者：
Sun, Ling-Jun;Li, Yong-Dong;Gu, Bin-Xian
目的探讨磁共振血管成像（MRA）中动脉瘤流出角（OA）对侧壁小动脉瘤（SCA）与漏斗部的鉴别诊断价值。方法2007年6月至2015年7月，对426例SCA患者同时进行MRA和DSA检查。其中，156例小SCA患者和52例漏斗部患者纳入本研究。OA ≥90°的患者定义为SCA，而OA <90°的患者定义为漏斗部。结果DSA共发现156例患者的172个SCA，52例患者的55个漏斗部。156例患者172个SCA的MRA显示的平均OA为102.96°±13.36°（范围60° ~ 151 °）。147例患者中159例（92.4%）小SCA的OA ≥90°，而13例SCA的OA <90°。52例55个漏斗部MRA显示平均OA为69.05°±14.26°（35 ° ~ 107°）。在1例患者中观察到1个漏斗的OA ≥90°;而在51例患者中观察到54个漏斗（98.2%）的OA <90°。SCA的平均OA（n=172）大于漏斗部的平均OA（n=55; 102.96° vs 69.05°，p<0.001）。结论MRA的OA可作为小SCA与漏斗的鉴别诊断指标。
Objective To evaluate whether the aneurysm outflow angle (OA) at MR angiography (MRA) might serve as discriminant for accurate diagnosis of, and differentiation between, small sidewall cerebral aneurysms (SCAs) and infundibula. Methods Between June 2007 and July 2015, 426 consecutive patients with SCAs completed both an MRA and DSA examination. Of these, 156 patients with small SCAs and 52 patients with infundibula were included in this study. A patient with an OA ≥90° was defined as having a SCA, while those with OA <90° were defined as having an infundibulum. Results DSA identified 172 SCAs in 156 patients and 55 infundibula in 52 patients. The average OA on MRA was 102.96°±13.36° (range 60°–151°) in 172 SCAs of 156 patients. An OA of ≥90° was seen for 159 (92.4%) small SCAs in 147 patients, while an OA of <90° was observed for 13 SCAs. The average OA on MRA was 69.05°±14.26° (range 35–107°) in 55 infundibula of 52 patients. An OA of ≥90° was seen in one patient with one infundibulum; while an OA of <90° was observed for 54 infundibula (98.2%) in 51 patients. The average OA in SCAs (n=172) was greater than the average OA in infundibula (n=55; 102.96° vs 69.05°, p<0.001). Conclusions The OA at MRA could serve as discriminant for accurate diagnosis of, and differentiation between, small SCAs and infundibula.