Cerebral angiography; Endovascular treatment of acute ischemic stroke; Endovascular treatment of extracranial carotid stenosis; Endovascular treatment of intracranial stenosis; Endovascular treatment of extracranial vertebral artery stenosis; Endovascular treatment of intracranial aneurysms; Endovascular treatment on intracranial arteriovenous malformation; Endovascular treatment of intracranial and extracranial tumors; Diagnostic and provocative testing; Endovascular treatment of traumatic vascular injury; Endovascular treatment of carotid and vertebral dissections; Endovascular treatment of central retinal artery occlusion; Endovascular treatment of epistaxis.