Sub-0.1 microliter CBV fMRI on the Next Generation 7T scanner
Sub-0.1 microliter CBV fMRI on the Next Generation 7T scanner
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下一代 7T 扫描仪上的 0.1 微升以下 CBV fMRI
DOI:
10.58530/2022/0397
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发表时间:
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通讯作者:
R. Huber
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作者:
D. Feinberg;Salvatore Torrisi;A. Beckett;R. Stirnberg;T. Stöcker;P. Ehses;R. Huber
Laminar-specific fMRI with CBV-sensitive VASO can address neuroscience research questions on directional information processing within and across brain areas. However, conventional 0.8mm resolutions cannot Nyquist sample the individual layer-groups of interest (e.g. Layers II/III from layer IVc in V1). Here we implement, evaluate, and apply a 0.39-0.45mm (iso.) VASO protocol on the NextGen 7T scanner to resolve layer-features that could not be resolved in humans before. We find that 0.45 mm protocols are possible if the sequence parameters of EPI-segmentation and GRAPPA acceleration are differently optimized than one would do for conventional fMRI protocols.