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. The aneurysm must have a neck width greater than or equal to (\>=) 4 millimeters (mm) or a dome-to-neck ratio less than (\<) 2, and the parent artery diameter must be \>= 2.0 mm and less than or equal to (\<=) 6.0 mm, including saccular and fusiform aneurysms * 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. The aneurysm must have a neck width \>= 4 mm or a dome-to-neck ratio \< 2, and the parent artery diameter must be \>= 2.0 mm and \<= 6.0 mm, including saccular and fusiform aneurysms Exclusion criteria: Partic…