BACKGROUND AND PURPOSE Precise stent deployment is important for successful treatment of intracranial aneurysms by stent-assisted coiling (SAC). We evaluated the accuracy of virtual stents generated using commercial stent planning software by comparing the length of virtual and actually deployed intracranial laser cut stents on three-dimensional digital subtraction angiography (3D-DSA) images. METHODS We retrospectively analyzed the data of 75 consecutive cases of intracranial wide-necked aneurysms treated with the SAC technique using laser cut stents. Based on 3D-DSA images acquired by C-arm CT, stent sizing and placement were intraoperatively simulated by a commercial software application. The difference in length of the stents was estimated by measuring proximal discrepancies between the end points of the virtual and actually deployed stents on fused pre-procedural and post-procedural 3D-DSA images. Discrepancies between distal stent end points were manually minimized. The Kruskal-Wallis test was applied to test whether stent location, type, and length had an effect on difference in length between virtual and real stent. RESULTS The median difference in length between virtual and real stents was 1.58 mm with interquartile range 1.12-2.12 mm. There was no evidence for an effect of stent location (p = 0.23), stent type (p = 0.33), or stent length (p = 0.53) on difference in length between virtual and real stents. CONCLUSIONS Stent planning software allows 3D simulation of laser cut stents overlain on 3D-DSA images of vessels and may thus be useful for stent selection and deployment of laser cut stents during stent-assisted coiling of intracranial aneurysms.

中文翻译：

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虚拟支架的长度在颅内宽颈动脉瘤治疗中的准确性。

背景与目的准确的支架部署对于通过支架辅助线圈（SAC）成功治疗颅内动脉瘤很重要。通过在三维数字减影血管造影（3D-DSA）图像上比较虚拟和实际部署的颅内激光切割支架的长度，我们评估了使用商用支架计划软件生成的虚拟支架的准确性。方法我们回顾性分析了使用激光切割支架通过SAC技术治疗的75例连续颅内宽颈动脉瘤病例的数据。基于C型臂CT采集的3D-DSA图像，通过商业软件在术中模拟支架的尺寸和位置。通过在融合的手术前和手术后3D-DSA图像上测量虚拟和实际部署的支架端点之间的近端差异，可以估算出支架的长度差异。手动将远端支架末端之间的差异最小化。使用Kruskal-Wallis检验来测试支架的位置，类型和长度是否对虚拟支架与实际支架之间的长度差产生影响。结果虚拟支架和真实支架之间的长度中位数差异为1.58 mm，四分位间距为1.12-2.12 mm。没有证据表明支架位置（p = 0.23），支架类型（p = 0.33）或支架长度（p = 0.53）对虚拟支架与实际支架之间的长度差有影响。