The effect of acquisition resolution on orientation decoding from V1 BOLD fMRI at 7T
The effect of acquisition resolution on orientation decoding from V1 BOLD fMRI at 7T
复制标题
采集分辨率对 7T V1 BOLD fMRI 方向解码的影响
DOI:
10.1016/j.neuroimage.2016.12.040
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发表时间:
2017
期刊:
影响因子:
5.7
通讯作者:
Pollmann
中科院分区:
文献类型:
--
作者:
Sengupta;Yakupov;Pollmann
A decade after it was shown that the orientation of visual grating stimuli can be decoded from human visual cortex activity by means of multivariate pattern classification of BOLD fMRI data, numerous studies have investigated which aspects of neuronal activity are reflected in BOLD response patterns and are accessible for decoding. However, it remains inconclusive what the effect of acquisition resolution on BOLD fMRI decoding analyses is. The present study is the first to provide empirical ultra high-field fMRI data recorded at four spatial resolutions (0.8 mm, 1.4 mm, 2 mm, and 3 mm isotropic voxel size) on this topic — in order to test hypotheses on the strength and spatial scale of orientation discriminating signals. We present detailed analysis, in line with predictions from previous simulation studies, about how the performance of orientation decoding varies with different acquisition resolutions. Moreover, we also examine different spatial filtering procedures and its effects on orientation decoding. Here we show that higher-resolution scans with subsequent down-sampling or low-pass filtering yield no benefit over scans natively recorded in the corresponding lower resolution regarding decoding accuracy. The orientation-related signal in the BOLD fMRI data is spatially broadband in nature, includes both high spatial frequency components, as well as large-scale biases previously proposed in the literature. Moreover, we found above chance-level contribution from large draining veins to orientation decoding. Acquired raw data were publicly released to facilitate further investigation.
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影响因子:
5.7
作者:
A. Weibull;H. Gustavsson;S. Mattsson;J. Svensson
通讯作者:
A. Weibull;H. Gustavsson;S. Mattsson;J. Svensson
DOI:
--
发表时间:
2008
期刊:
影响因子:
--
作者:
桜井康雄、長縄慎二、石橋一郎、榊原勝治、河村美奈子、川井恒;米田和夫
通讯作者:
米田和夫
影响因子:
3.7
作者:
Engel, SA;Glover, GH;Wandell, BA
通讯作者:
Wandell, BA
影响因子:
5.7
作者:
Triantafyllou, C;Hoge, RD;Wald, LL
通讯作者:
Wald, LL
DOI:
10.1523/jneurosci.13-10-04114.1993
发表时间:
1993-10
期刊:
--
影响因子:
--
作者:
K. Obermayer;G. Blasdel
通讯作者:
K. Obermayer;G. Blasdel