Department of Radiology, First Affiliated Hospital, Wenzhou Medical College, Wenzhou, 325000, China.
Eur Radiol. 2013 Oct;23(10):2861-7. doi: 10.1007/s00330-013-2890-2. Epub 2013 May 23.
To analyse the characteristics of basilar artery (BA) fenestrations and their coexistence with aneurysms and other anomalies in a massive cases by computed tomographic angiography (CTA).
A total of 5,657 sequential cerebral CTA images performed from January 2006 to February 2012 were reviewed. CTA images were obtained from the raw datasets by using volume rendering and maximal intensity projection reconstruction.
One hundred and thirty-two (2.33 %) BA fenestrations were detected with CTA, and most common at the proximal segment (n = 124). BA fenestration-associated aneurysms were found in 34 cases and 7 located at the posterior circulation, and the frequency of posterior circulation aneurysms was significantly different in patients with and without BA fenestrations (P = 0.025). Other associated anomalies included arteriovenous malformation (n = 7) and moyamoya disease (n = 6). BA fenestrations were classified into Type I (74 cases), Type II (15 cases), Type III (41 cases) and Type IV (2 cases). A significant difference was observed between Types II + III associated with convex-lens-like and slit-like fenestrations (P = 0.008).
BA fenestrations were found in 2.33 % with CTA. They were significantly more often associated with posterior circulation aneurysms than those without BA fenestration. The anterior inferior cerebral artery (AICA) tends to originate more often from convex-lens-like fenestration than slit-like.
• Basilar artery fenestrations were found in 2.33 % of patients undergoing CT angiography. • Fenestrations were seen more often in the lower third with slit-like configurations. • No obvious relationship exists between basilar artery fenestration and aneurysm formation. • Basilar artery fenestrations perhaps predispose a patient to posterior circulation aneurysm formation. • The AICA tends to originate more often from convex-lens-like than slit-like fenestrations.
通过计算机断层血管造影（CTA）分析大量病例中基底动脉（BA）窗孔的特征及其与动脉瘤和其他异常的共存情况。
回顾 2006 年 1 月至 2012 年 2 月期间进行的 5657 例连续脑部 CTA 图像。使用容积再现和最大强度投影重建从原始数据集获得 CTA 图像。
通过 CTA 检测到 132 例（2.33%）BA 窗孔，最常见于近端节段（n=124）。在 34 例中发现了与 BA 窗孔相关的动脉瘤，其中 7 例位于后循环，后循环动脉瘤的频率在后循环动脉瘤患者与无 BA 窗孔患者之间有显著差异（P=0.025）。其他相关异常包括动静脉畸形（n=7）和烟雾病（n=6）。BA 窗孔分为 I 型（74 例）、II 型（15 例）、III 型（41 例）和 IV 型（2 例）。II+III 型与凸透镜状和狭缝状窗孔之间存在显著差异（P=0.008）。
通过 CTA 发现 BA 窗孔占 2.33%。它们与后循环动脉瘤的相关性明显高于无 BA 窗孔患者。前下脑动脉（AICA）更倾向于从凸透镜状窗孔起源，而不是狭缝状。
接受 CT 血管造影的患者中有 2.33%发现基底动脉窗孔。
窗孔更常见于下部三分之一，呈狭缝状。
基底动脉窗孔与动脉瘤形成之间没有明显关系。
基底动脉窗孔可能使患者易发生后循环动脉瘤形成。
AICA 更倾向于从凸透镜状窗孔起源，而不是狭缝状。
