The contribution of myelin to magnetic susceptibility-weighted contrasts in high-field MRI of the brain

被引：172

作者：

Lee, Jongho ^{[1
,2
]}

Shmueli, Karin ^{[1
]}

Kang, Byeong-Teck ^{[3
,4
]}

Yao, Bing ^{[1
]}

Fukunaga, Masaki ^{[5
]}

van Gelderen, Peter ^{[1
]}

Palumbo, Sara ^{[6
]}

Bosetti, Francesca ^{[6
]}

Silva, Afonso C. ^{[3
]}

Duyn, Jeff H. ^{[1
]}

机构：

[1] Natl Inst Neurol Disorders & Stroke, Adv MRI Sect, Lab Funct & Mol Imaging, NIH, Bethesda, MD USA

[2] Univ Penn, Dept Radiol, Philadelphia, PA 19104 USA

[3] Natl Inst Neurol Disorders & Stroke, Cerebral Microcirculat Unit, Lab Funct & Mol Imaging, NIH, Bethesda, MD USA

[4] Chungbuk Natl Univ, Coll Vet Med, Dept Vet Internal Med, Cheongju, Chungbuk, South Korea

[5] Osaka Univ, WPI Immunol Frontier Res Ctr, Osaka, Japan

[6] NIA, Brain Physiol & Metab Sect, NIH, Bethesda, MD 20892 USA

来源：

NEUROIMAGE | 2012年 / 59卷 / 04期

关键词：

T-2* decay; R-2* relaxation; Phase image; Resonance frequency image; Demyelination; Cuprizone; Formalin fixation; WHITE-MATTER; DIFFUSION PROPERTIES; CORPUS-CALLOSUM; PHASE-CONTRAST; FIBER ORIENTATION; WATER RELAXATION; CEREBRAL-CORTEX; GRAY-MATTER; DEMYELINATION; CUPRIZONE;

D O I：

10.1016/j.neuroimage.2011.10.076

中图分类号：

Q189 [神经科学];

学科分类号：

071006 ;

摘要：

T-2*-weighted gradient-echo MRI images at high field (>= 7 T) have shown rich image contrast within and between brain regions. The source for these contrast variations has been primarily attributed to tissue magnetic susceptibility differences. In this study, the contribution of myelin to both T-2* and frequency contrasts is investigated using a mouse model of demyelination based on a cuprizone diet. The demyelinated brains showed significantly increased T-2* in white matter and a substantial reduction in gray-white matter frequency contrast, suggesting that myelin is a primary source for these contrasts. Comparison of in-vivo and in-vitro data showed that, although tissue T-2* values were reduced by formalin fixation, gray-white matter frequency contrast was relatively unaffected and fixation had a negligible effect on cuprizone-induced changes in T-2* and frequency contrasts. Published by Elsevier Inc.

引用

页码：3967 / 3975

页数：9

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