Abstract
The aim was to assess the occurrence of magnetic susceptibility artifacts (MSA) following endovascular treatment of intracranial aneurysm by stent using susceptibility weighted imaging (SWI). Imaging and clinical data of 46 patients who underwent stent placement in the case of intracranial aneurysm endovascular treatment (S-Group) were retrospectively analyzed and compared to a control group (C-Group) in which 46 patients had coiling alone. The mean number of MSA was higher in the S-group than in the C-group on postprocedural SWI sequence (8.76, 95%CI [5.76; 11.76] vs. 0.78 [0.32; 1.25], respectively, p < 0.001) with a higher frequency of the appearance of MSA also in the S-group (78.26% vs. 21.74% in the C-group, p < 0.001). In the S-group, in the vascular territory of the treated artery, there was a higher number of MSA than in other vascular territories (mean of 5.18 [3.43; 6.92] vs. 3.08 [1.79; 4.36], p = 0.001). An odds ratio (OR) of 20.98 [5.24; 83.95] suggested a higher proportion of onset of MSA in the S-group than in the C-group (p < 0.001). The appearance of MSA after a treatment by stenting for intracranial aneurysm in patients under antiplatelet therapy was common, particularly in the treated artery territory.
Highlights
Endovascular coil embolization is a widely performed treatment modality for intracranial aneurysms
The aim of this study was to assess the occurrence of magnetic susceptibility artifacts (MSA) following endovascular treatment of intracranial aneurysm by stent using susceptibility weighted imaging (SWI)
Between June 2015 and June 2018, we retrospectively reviewed at our center the demographic and radiological data of consecutive patients (age, sex, aneurysm localization, type and duration of antiplatelet therapy, history of previous sub-arachnoid hemorrhage (SAH) in the case of retreatment, date of first and follow-up magnetic resonance imaging (MRI) examinations) treated by stent to constitute the stent group (S-group)
Summary
Endovascular coil embolization is a widely performed treatment modality for intracranial aneurysms. This technique attempts to exclude the aneurysm from the intracranial circulation by filling the sac with coils [1]. One of the major problems of coils is the rate of recanalization of the aneurysmal sac [3]. This is why embolization techniques using stents (including flow diverters, FDs) are increasingly used, especially for difficult-to-treat aneurysms [4,5,6] (i.e., giant aneurysms, fusiform aneurysms, blood blister-like aneurysms, and wide neck aneurysms). The risk of recanalization after treatment with stent is lower compared to treatment with coils alone [4,6,7,8]
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