A Study of Choydar Flow-Directed Mesh Stent in the Treatment of Unruptured Intracranial Aneurysms

Inclusion criteria: Participants meeting all the following inclusion criteria will be included: Preoperative inclusion criteria: * Presence of unruptured aneurysms in the internal carotid artery (from the petrous segment to the distal end) or vertebral artery identified by digital subtraction angiography (DSA), computed tomography angiography (CTA), or magnetic resonance angiography (MRA) prior to surgery, wide-neck (neck width greater than or equal to \[\>=\] 4 millimeters \[mm\] or dome-to-neck ratio less than \[\<\] 2) saccular or fusiform aneurysms, and the parent artery diameter must be \>= 2.0 mm and less than or equal to \[\<=\] 6.0 mm * Participants and/or their authorized representatives understand the purpose of the study, and are willing to voluntarily participate in the study and sign the informed consent form (ICF) * Prior to enrollment, a clinical decision has already been made to use the choydar flow-directed mesh stent * Participants who are willing and able to return for all follow-up visits as required by the study protocol Intraoperative inclusion criteria: \- Presence of unruptured aneurysms in the internal carotid artery (from the petrous segment to the distal end) or vertebral artery identified by DSA during the procedure, wide-neck (neck width \>= 4 mm or dome-to-neck ratio \<2) saccular or fusiform aneurysms, and the parent artery diameter must be \>= 2.0 mm and \<= 6.0 mm Exclusion criteria: Participants meeting any of the following exclusion c…