Assessment and Quantification of Collateral by ASL MRI
Arterial Spin Labeling MRI Assessment and Quantification of Collateral Circulation in Unilateral Middle Cerebral Artery Atherosclerotic Stenosis
연구 개요
상태
정황
상세 설명
Patients with unilateral middle cerebral artery (MCA) moderate to severe stenosis were consecutively enrolled. MRI protocols including diffusion weighted image, magnetic resonance angiography , 3D pCASL with two PLD of 1.5s and 2.5s were performed.
Cerebral blood flow(CBF) map of 3D pCASL with PLD 1.5s and 2.5s were postprocessed on workstation. Subtraction images were obtained by CBF 2.5s subtracted CBF 1.5s. Slices involving MCA downstream territory were equally separated as upper slices,middle slices and inferior slices corresponding to CIS system referring to previous study of Al-Ali F. Slices with residual signal areas more than 1/3 MCA territory involved would count 1, or would be 0. Total ASL collateral score(ASLCS) was calculated from 0-3. Then ,favorable collaterals were graded as total ASLCS 2-3 and poor collaterals were graded as total ASLCS 0-1.
Early-arriving flow perfusion proportion was defined as [CBF 1.5s at lesion side/CBF 2.5s of the contralateral side]×100%. Late-arriving perfusion proportion was defined as [(CBF 2.5s minus CBF 1.5s) at lesion side minus (CBF 2.5s minus CBF 1.5s) at normal side]/CBF 2.5s at the contralateral side ×100%. Antegrade scales and collateral grades were evaluated in patients with conventional angiography. Spearman correlation was analyzed between early-arriving and late-arriving flow and angiographic antegrade and collateral scales.
Baseline characteristics of patients were recorded including age, gender, hypertension,hypercholesterolemia,diabetes mellitus,smoking,obesity,qualifying stroke event, admission National Institute of Health stroke scale (NIHSS), diffusion-weighted image-ASPECTS.
One year stroke event recurrence and three months modified Rankin Scale (mRS) were followed up by neurologist by phone call or face to face.
Multi-variants Logistic Regression is performed to exam whether ASL collateral score and collateral perfusion quantification is significantly correlated with future ischemic event and functional outcome.
연구 유형
등록 (예상)
연락처 및 위치
연구 장소
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Beijing
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Beijing, Beijing, 중국, 100853
- 모병
- Chinese PLA General Hospital
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참여기준
자격 기준
공부할 수 있는 나이
건강한 자원 봉사자를 받아들입니다
연구 대상 성별
샘플링 방법
연구 인구
설명
Inclusion Criteria:
- Ischemic stroke or TIA in anterior circulation within 90 days
- MCA atherosclerotic moderate to severe stenosis(50%-99%) confirmed by conventional angiography or magnetic resonance angiography
- Age >18
- 2 or more atherosclerotic risk factors including hypertension, hypercholesterolemia, diabetes mellitus, cigarette smoking, and obesity
- Medical treatment
- Not receiving stent therapy
- Ability to comply with all studies
Exclusion Criteria:
- Multiple intracranial arteries stenosis (> 50%) or occlusion
- Less than 2 atherosclerotic risk factors
- Pregnancy and other contraindication to MRI scan
- Informed consent not obtained
공부 계획
연구는 어떻게 설계됩니까?
디자인 세부사항
코호트 및 개입
그룹/코호트 |
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Collateral Circulation
Symptomatic patients with unilateral MCA severe stenosis confirmed ≥ 90% by magnetic resonance angiography or 70-99% by conventional angiography were performed 3D pseudo-Continuous Arterial Spin Labeling MRI.
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연구는 무엇을 측정합니까?
주요 결과 측정
결과 측정 |
측정값 설명 |
기간 |
|---|---|---|
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Stroke Event
기간: Up to 1 year
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The patients were monitored whether they recured ischemic stroke event including transient ischemic attack (TIA) or stroke confirmed by neurologist and diffusion-weighted image MRI.
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Up to 1 year
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2차 결과 측정
결과 측정 |
측정값 설명 |
기간 |
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modified Rankin Score
기간: 3 months
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mRS of patients with acute or subacute stroke after 3 months were followed up for neurological outcome assessment.
mRS < 2 was defined as favorable neurological outcome and mRS ≥ 2 was defined as poor neurological outcome.
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3 months
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공동 작업자 및 조사자
수사관
- 연구 의자: Xin Lou, MD, PHD., Chinese PLA General Hospital
간행물 및 유용한 링크
일반 간행물
- Al-Ali F, Jefferson A, Barrow T, Cree T, Louis S, Luke K, Major K, Nemeth D, Smoker S, Walker S. The capillary index score: rethinking the acute ischemic stroke treatment algorithm. Results from the Borgess Medical Center Acute Ischemic Stroke Registry. J Neurointerv Surg. 2013 Mar;5(2):139-43. doi: 10.1136/neurintsurg-2011-010146. Epub 2012 Jan 19.
- Zaidat OO, Yoo AJ, Khatri P, Tomsick TA, von Kummer R, Saver JL, Marks MP, Prabhakaran S, Kallmes DF, Fitzsimmons BF, Mocco J, Wardlaw JM, Barnwell SL, Jovin TG, Linfante I, Siddiqui AH, Alexander MJ, Hirsch JA, Wintermark M, Albers G, Woo HH, Heck DV, Lev M, Aviv R, Hacke W, Warach S, Broderick J, Derdeyn CP, Furlan A, Nogueira RG, Yavagal DR, Goyal M, Demchuk AM, Bendszus M, Liebeskind DS; Cerebral Angiographic Revascularization Grading (CARG) Collaborators; STIR Revascularization working group; STIR Thrombolysis in Cerebral Infarction (TICI) Task Force. Recommendations on angiographic revascularization grading standards for acute ischemic stroke: a consensus statement. Stroke. 2013 Sep;44(9):2650-63. doi: 10.1161/STROKEAHA.113.001972. Epub 2013 Aug 6. No abstract available.
- Liebeskind DS, Cotsonis GA, Saver JL, Lynn MJ, Cloft HJ, Chimowitz MI; Warfarin-Aspirin Symptomatic Intracranial Disease (WASID) Investigators. Collateral circulation in symptomatic intracranial atherosclerosis. J Cereb Blood Flow Metab. 2011 May;31(5):1293-301. doi: 10.1038/jcbfm.2010.224. Epub 2010 Dec 15.
- Liebeskind DS, Cotsonis GA, Saver JL, Lynn MJ, Turan TN, Cloft HJ, Chimowitz MI; Warfarin-Aspirin Symptomatic Intracranial Disease (WASID) Investigators. Collaterals dramatically alter stroke risk in intracranial atherosclerosis. Ann Neurol. 2011 Jun;69(6):963-74. doi: 10.1002/ana.22354. Epub 2011 Mar 17.
- Lyu J, Ma N, Liebeskind DS, Wang DJ, Ma L, Xu Y, Wang T, Miao Z, Lou X. Arterial Spin Labeling Magnetic Resonance Imaging Estimation of Antegrade and Collateral Flow in Unilateral Middle Cerebral Artery Stenosis. Stroke. 2016 Feb;47(2):428-33. doi: 10.1161/STROKEAHA.115.011057. Epub 2016 Jan 5.
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연구 주요 날짜
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기본 완료 (예상)
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