Uchino Akira, Saito Naoko, Tanahashi Norio
Department of Diagnostic Radiology, Saitama Medical University International Medical Center, 1397-1 Yamane, Hidaka, Saitama, 350-1298, Japan.
Department of Neurology and Cerebrovascular Medicine, Saitama Medical University International Medical Center, Hidaka, Japan.
Surg Radiol Anat. 2018 Jun;40(6):721-725. doi: 10.1007/s00276-017-1953-5. Epub 2017 Dec 7.
Rarely, the anterior cerebral artery (ACA) arises from the ophthalmic segment of the internal carotid artery, a condition described as carotid-ACA anastomosis or infraoptic course of the ACA that generally demonstrates right-sided predominance. We diagnosed a case of bilateral anastomoses of the carotid and ACA vessels in which bilateral ophthalmic arteries arose from the origins of the anastomotic vessels using magnetic resonance (MR) angiography. Identification of rare arterial variations on MR angiography requires careful scrutiny of source images, and creation of partial volume-rendering images can aid visualization of detailed anatomic structures.
大脑前动脉（ACA）极少起源于颈内动脉的眼段，这种情况被称为颈动脉-ACA吻合或ACA的视下走行，通常以右侧为主。我们诊断了一例颈动脉与ACA血管双侧吻合的病例，通过磁共振（MR）血管造影发现双侧眼动脉均起源于吻合血管的起始处。在MR血管造影上识别罕见的动脉变异需要仔细审视源图像，而创建部分容积再现图像有助于详细解剖结构的可视化。
