Ferumoxytol enhanced resting state fMRI and relative cerebral blood volume mapping in normal human brain.

Ferumoxytol enhanced resting state fMRI and relative cerebral blood volume mapping in normal human brain.
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DOI:
10.1016/j.neuroimage.2013.06.066
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发表时间:
2013-12
期刊:
影响因子:
5.7
通讯作者:
Blankenberg, Francis
Blankenberg, Francis
中科院分区:
医学1区
文献类型:
--
作者:
D'Arceuil, Helen;Coimbra, Alexandre;Triano, Pamela;Dougherty, Margaret;Mello, Julie;Moseley, Michael;Glover, Gary;Lansberg, Maarten;Blankenberg, Francis

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大脑表现出自发的低频(< 0.1 Hz)脑血流量(CBF)波动,可通过静息态功能MRI(rs-fMRI)测量。与BOLD效应相比,超小超顺磁性氧化铁颗粒已被证明可以增强基于任务的fMRI信号(脑血容量fMRI或CBV-fMRI),在灵长类动物和人类中,在3 T下的系数为2.5。我们评估了使用ferumoxytol的稳态,静息态功能磁共振成像(CBV-rs-fMRI)和相对脑血容量(rCBV)映射,在3特斯拉,在健康志愿者。所有受试者的静息态网络(RSN)均被识别,视觉和默认模式(DMN)网络的RSN Z统计量(旋律独立成分)和容量平均相当,视觉(维斯)和DMN网络的rCBV值平均,并与相应的DMN和视觉网络Z统计量相关。对于BOLD和CBVrs-fMRI对比度,DMN的rCBV和Z统计量之间呈负相关(R2= 0.63,0.76)。视觉网络中未发现类似的相关性。短重复时间的rs-fMRI数据进行傅立叶变换,以评估ferumoxytol对大脑rs-BOLD,CBV信号中的心脏和呼吸波动的影响。心脏和呼吸波动减少到基线内的大血管后ferumoxytol。鲁棒的rs-fMRI和CBV映射是可能的,在正常人脑。
The brain demonstrates spontaneous low-frequency (< 0.1 Hz) cerebral blood flow (CBF) fluctuations, measurable by resting-state functional MRI (rs-fMRI). Ultra small superparamagnetic iron oxide particles have been shown to enhance task-based fMRI signals (cerebral blood volume fMRI or CBV-fMRI), compared to the BOLD effect, by a factor of ≈ 2.5 at 3T in primates and humans. We evaluated the use of ferumoxytol for steady state,resting state FMRI (CBV-rs-fMRI) and relative cerebral blood volume (rCBV) mapping, at 3 Tesla, in healthy volunteers. All standard resting state networks (RSNs) were identified in all subjects.On average the RSN Z-statistics(Melodic independent components)and volumes of the Visual and default mode (DMN)networks were comparable rCBV values were averaged forthe visual (Vis) and DMN networks and correlated with the corresponding DMN and Visual network Z statistics. There was a negative correlation between the rCBV and the Z-statisticsforthe DMN, for both BOLD and CBVrs-fMRI contrast (R2= 0.63, 0.76).A similar correlation was not found for the visual network. Short repetition time rs-fMRI data were Fourier transformed to evaluate the effect of ferumoxytol on cardiac and respiratory fluctuations in the brain rs-BOLD, CBV signals. Cardiac and respiratory fluctuations decreased to baseline within large vessels post ferumoxytol.Robust rs-fMRI and CBV mapping is possible in normal human brain.
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