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Magnetic resonance angiography of hypoplastic A1 segment of anterior cerebral artery at 3.0-Tesla in Andhra Pradesh population of India

Pentyala S, Sankar KD, Bhanu PS, Kumar NS

Pre-communicating or A1 segment of anterior cerebral artery (A1ACA) hypoplasia can negotiate the anterior cerebral circulation. Not many studies have been examined the association of hypoplastic A1ACA and cerebral ischemic...
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Transient forebrain ischemia induces impairment in cognitive performance prior to extensive neuronal cell death in Mongolian gerbil (Meriones unguiculatus)

Kondo T, Yoshida S, Nagai H, Takeshita , Mino M, Morioka H, Nakajima T, Kusakabe K, Okada T

In Mongolian gerbils, bilateral common carotid artery occlusion (BCCAO) for several minutes induces ischemia, due to an incomplete circle of Willis, resulting in delayed neuronal cell death in the Cornet...
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Differentiating Carotid Terminus Occlusions into Two Distinct Populations Based on Willisian Collateral Status

Lee SU, Hong JM, Kim SY, Bang OY, Demchuk AM, Lee JS

BACKGROUND AND PURPOSE: The outcomes of acute internal carotid artery (ICA) terminus occlusions are poor. We classified ICA terminus occlusions into 2 groups according to the occlusion pattern of the...
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Moyamoya Disease: Cardiologist's Perspectives

Kim DK, Chang SA, Park TK

Moyamoya disease (MMD) is a steno-occlusive disease of the cerebral artery around the circle of Willis. It was first described in 1957 in Japan and named because the characteristic appearance...
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Quantitative Magnetic Resonance Angiography in Internal Carotid Artery Occlusion with Primary Collateral Pathway

Bae YJ, Jung C, Kim JH, Choi BS, Kim E

BACKGROUND AND PURPOSE: Quantitative magnetic resonance angiography (Q-MRA) enables direct measurement of volume flow rate (VFR) of intracranial arteries. We aimed to evaluate the collateral flows in internal carotid artery...
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A Functional Perspective on the Embryology and Anatomy of the Cerebral Blood Supply

Menshawi K, Mohr JP, Gutierrez

The anatomy of the arterial system supplying blood to the brain can influence the development of arterial disease such as aneurysms, dolichoectasia and atherosclerosis. As the arteries supplying blood to...
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Two adolescent patients with coexistent Graves' disease and Moyamoya disease in Korea

Cheon CK, Kim SY, Yoo JH

Moyamoya disease is a cerebrovascular condition that results in the narrowing of the vessels of the circle of Willis and collateral vessel formation at the base of the brain. Although...
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A Comparative Review of the Hemodynamics and Pathogenesis of Cerebral and Abdominal Aortic Aneurysms: Lessons to Learn From Each Other

Tanweer O, Wilson TA, Metaxa E, Riina HA, Meng H

OBJECTIVE: Cerebral aneurysms (CAs) and abdominal aortic aneurysms (AAAs) are degenerative vascular pathologies that manifest as abnormal dilations of the arterial wall. They arise with different morphologies in different types...
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Correlation of Cerebrovascular Reserve as Measured by Acetazolamide-Challenged Perfusion CT with Collateral Circulation in Unilateral High Grade Carotid Stenosis

Hong D, Lee YH, Seo HS, Je BK, Suh SI, Seol HY, Lee NJ, Kim JH, Yang KS

PURPOSE: We correlated cerebrovascular reserve in unilateral high grade carotid artery stenosis or occlusion with a type of collateral circulation using acetazolamide-challenged perfusion CT (ACZ-PCT). MATERIALS AND METHODS: Among the patients...
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Selective shunt during carotid endarterectomy using routine awake test with respect to a lower shunt rate

Cho J, Lee KK, Yun WS, Kim HK, Hwang YH, Huh S

PURPOSE: To evaluate shunt rate and discuss the resultsrelated to selective shunt placement during carotid endarterectomy (CEA) using routine awake test. METHODS: Patients with CEA from 2007 to 2011 were retrospectively...
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Clinical Features of Acute Subdural Hematomas Caused by Ruptured Intracranial Aneurysms

Oh SY, Kwon JT, Park YS, Nam TK, Park SW, Hwang SN

OBJECTIVE: Spontaneous acute subdural hematomas (aSDH) secondary to ruptured intracranial aneurysms are rarely reported. This report reviews the clinical features, diagnostic modalities, treatments, and outcomes of this unusual and often...
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Image Quality of the 3 Dimensional Phase-Contrast Technique in an Intracranial Magnetic Resonance Angiography with Artifacts Caused by Orthodontic Devices: A Comparison with 3 Dimensional Time-of-Flight Technique

Kang SJ, Kim YS, Hong HS, Kim DH

PURPOSE: To evaluate the degree of image distortion caused by orthodontic devices during a intracranial magnetic resonance angiography (MRA), and to determine the effectiveness of the 3 dimensional phase-contrast (3D...
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Infraoptic Course of the Anterior Cerebral Artery: Case Report

Kim MS, Yoon SW, Lee GJ, Lee CH

  • KMID: 1448991
  • Korean J Cerebrovasc Surg.
  • 2011 Mar;13(1):15-18.
An infraoptic course of the anterior cerebral artery (ACA) is a rare anomaly of the anterior part of the circle of Willis. About 56 cases have been reported, often in...
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A1 Segment Hypoplasia/aplasia Detected by Magnetic Resonance Angiography in Neuropediatric Patients

Han YK, Kim S, Yoon CS, Lee YM, Kang HC, Lee JS, Kim HD

  • KMID: 2329486
  • J Korean Child Neurol Soc.
  • 2011 Dec;19(3):231-239.
PURPOSE: A variation in the circle of Willis is not so common, but the most frequent type is hypoplasia/aplasia of the precommunicating anterior cerebral arteries (A1 segment). We aimed to...
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A simple technique for morphological measurement of cerebral arterial circle variations using public domain software (Osiris)

Ansari S, Dadmehr M, Eftekhar B, McConnell , Ganji S, Azari H, Kamali-Ardakani S, Hoh BL, Mocco J

This article describes a straightforward method to measure the dimensions and identify morphological variations in the cerebral arterial circle using the general-purpose software program Osiris. This user-friendly and portable program...
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Development of 'De novo' Aneurysm after Therapeutic Carotid Occlusion

Jin SC, Choi CG, Kwon DH

Carotid occlusion is an inevitable therapeutic modality for the treatment of complex aneurysms such as giant, traumatic, and intracavernous aneurysms. Late complications of carotid occlusion include 'de novo' aneurysm formation...
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A Case of Neurofibromatosis Type I with Moyamoya Syndrome and Ganglioneuroma in Lung

Sim JY, Lim JS, Han YS, Kim JY, Kim WS

  • KMID: 2329432
  • J Korean Child Neurol Soc.
  • 2009 Nov;17(2):221-225.
Neurofibromatosis type I is one of the most common neurocutaneous syndrome which is inherited by autosomal dominant manner, characterized by cafe au-lait spots, axillary freckling, Lisch nodules in iris, multiple...
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Ruptured Cerebral Aneurysm without Subarachnoid Hemorrhage: Who needs angiography?

Hue YH, Chun HJ, Im TH, Yi HJ, Ko Y, Kim JM

  • KMID: 1480664
  • Korean J Cerebrovasc Surg.
  • 2008 Dec;10(4):556-562.
OBJECTIVE: Ruptured intracranial aneurysms usually present as a subarachnoid hemorrhage (SAH), but are sometimes associated with intracerebral hemorrhage (ICH), intraventricular hemorrhage (IVH), or subdural hematoma (SDH). However, the presentation of...
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Congenital Hypoplasia of Internal Carotid Artery Accompanying with Cerebral Aneurys

Baek GS, Koh EJ, Lee WJ, Choi HY

  • KMID: 2118526
  • J Korean Neurosurg Soc.
  • 2007 May;41(5):343-346.
Hypoplasia of the internal carotid artery is a rare congenital anomaly. Agenesis, aplasia, and hypoplasia of the internal carotid artery (ICA) are frequently associated with cerebral aneurysms in the circle...
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Moyamoya Disease in Children and Adolescents

Lee SI, Chi GH, Hwang TG

  • KMID: 2329517
  • J Korean Child Neurol Soc.
  • 2007 Nov;15(2):179-184.
PURPOSE: Moyamoya disease is a chronic cerebrovascular illness characterized by bilateral stenoses or occlusions of the arteries around the circle of Willis with prominent collateral circulation. We studied 36 children...
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