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目的探讨多层螺旋CT血管成像(CTA)在诊断永存三叉动脉(PTA)中的价值。资料与方法回顾性分析2546例行头颅64层螺旋CTA检查者中的10例PTA患者的影像学资料,分析PTA的发生率、起源、走行、后循环供血及合并其他血管畸形的情况。结果 (1)PTA的发生率为0.39%(10/2546),其中1例位于右侧,9例位于左侧。(2)三叉动脉均起自颈内动脉海绵窦段,血管走行外侧型8例,中央型2例;按Saltzman分型显示PTA后循环供血情况:Ⅰ型7例,Ⅱ型1例,Ⅲ型2例。(3)吻合点近端的基底动脉及双侧椎动脉发育不良7例。结论 64层CTA能清晰、准确地显示PTA的走行及后循环供血情况。
Objective To investigate the value of multislice CT angiography (CTA) in the diagnosis of permanent trigeminal artery (PTA). Materials and Methods The imaging data of 10 patients with PTA in 2546 patients with 64-slice spiral CT scans were retrospectively analyzed. The incidence, origin, travel, posterior circulation blood supply and other vascular malformations were analyzed. Results (1) The incidence of PTA was 0.39% (10/2546), of which 1 was on the right and 9 was on the left. (2) The trigeminal arteries all originated from the cavernous sinus segment of the internal carotid artery. There were 8 cases in lateral type and 2 in central type. Salusman classification showed that there were 7 cases of type Ⅰ, 1 case of type Ⅱ, 2 cases. (3) 7 cases of basilar artery and bilateral vertebral artery dysplasia near the anastomosis point. Conclusion 64-layer CTA can clearly and accurately show the PTA’s travel and blood circulation after the situation.