Abstract
Background and PurposePrecise 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.MethodsWe 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.ResultsThe 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.ConclusionsStent 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.
Highlights
Braided stents including flow diverters are increasingly used for the treatment of wide-necked aneurysms of a diameter [ 10 mm [1, 2], stent-assisted coiling (SAC) remains a common treatment option for most cases [3,4,5,6,7]
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 deployed intracranial laser cut stents on three-dimensional digital subtraction angiography (3D-DSA) images
Summary
Braided stents including flow diverters are increasingly used for the treatment of wide-necked aneurysms of a diameter [ 10 mm [1, 2], stent-assisted coiling (SAC) remains a common treatment option for most cases [3,4,5,6,7]. SAC combines aneurysm coiling with parent artery reconstruction with a stent [8, 9]. It is commonly used in the treatment of simple sidewall saccular aneurysms, bifurcation aneurysms, fusiform aneurysms, and aneurysms with a poor dome-to-neck ratio, a wide neck, or complex anatomy [10]. 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 deployed intracranial laser cut stents on three-dimensional digital subtraction angiography (3D-DSA) images
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