Multi-projection magnetic resonance inverse imaging of the human visuomotor system

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Multi-projection magnetic resonance inverse imaging of the human visuomotor system. / Wen-Kai Tsai, Kevin; Nummenmaa, Aapo; Witzel, Thomas; Chang, Wei-Tang; Kuo, Wen-Jui; Lin, Fa Hsuan.

In: NeuroImage, Vol. 61, No. 1, 15.05.2012, p. 304-313.

Research output: Contribution to journalArticleScientificpeer-review

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Wen-Kai Tsai, K, Nummenmaa, A, Witzel, T, Chang, W-T, Kuo, W-J & Lin, FH 2012, 'Multi-projection magnetic resonance inverse imaging of the human visuomotor system', NeuroImage, vol. 61, no. 1, pp. 304-313. https://doi.org/10.1016/j.neuroimage.2012.01.115

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Wen-Kai Tsai, Kevin ; Nummenmaa, Aapo ; Witzel, Thomas ; Chang, Wei-Tang ; Kuo, Wen-Jui ; Lin, Fa Hsuan. / Multi-projection magnetic resonance inverse imaging of the human visuomotor system. In: NeuroImage. 2012 ; Vol. 61, No. 1. pp. 304-313.

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@article{95c0b657b26f4cba8f5000efd929508d,
title = "Multi-projection magnetic resonance inverse imaging of the human visuomotor system",
abstract = "Using highly parallel radiofrequency (RF) detection, magnetic resonance inverse imaging (InI) can achieve 100. ms temporal resolution with whole brain coverage. This is achieved by trading off partition encoding steps and thus spatial resolution for a higher acquisition rate. The reduced spatial information is estimated by solving under-determined inverse problems using RF coil sensitivity information. Here we propose multi projection inverse imaging (mInI) to combine different projection images to improve the spatial resolution of InI. Specifically, coronal, sagittal, and transverse projection images were acquired from different runs of the fMRI acquisitions using a 32-channel head coil array. Simulations show that mInI improves the quality of the instantaneous image reconstruction significantly. Going from one projection to three projections, the spatial resolution quantified by the full width at half maximum of the point-spread function (PSF) is improved from 2.6 pixels to 1.4 pixels (4. mm nominal resolution per pixel). Considering the shape of the PSF, the effective spatial resolution is improved from 16.9 pixels to 4.7 pixels. In vivo fMRI experiments using a two-choice reaction time tasks show visual and sensorimotor cortical activities spatially consistent with typical EPI data, yet mInI offers 100. ms temporal resolution with the whole brain coverage. The mInI data with three projections revealed that the sensorimotor cortex was activated 700. ms after the visual cortex. mInI can be applied to BOLD-contrast fMRI experiments to characterize the dynamics of the activated brain areas with a high spatiotemporal resolution.",
keywords = "Event-related, FMRI, InI, Inverse problem, Motor, MRI, Projection, Visual",
author = "{Wen-Kai Tsai}, Kevin and Aapo Nummenmaa and Thomas Witzel and Wei-Tang Chang and Wen-Jui Kuo and Lin, {Fa Hsuan}",
year = "2012",
month = "5",
day = "15",
doi = "10.1016/j.neuroimage.2012.01.115",
language = "English",
volume = "61",
pages = "304--313",
journal = "NeuroImage",
issn = "1053-8119",
number = "1",

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TY - JOUR

T1 - Multi-projection magnetic resonance inverse imaging of the human visuomotor system

AU - Wen-Kai Tsai, Kevin

AU - Nummenmaa, Aapo

AU - Witzel, Thomas

AU - Chang, Wei-Tang

AU - Kuo, Wen-Jui

AU - Lin, Fa Hsuan

PY - 2012/5/15

Y1 - 2012/5/15

N2 - Using highly parallel radiofrequency (RF) detection, magnetic resonance inverse imaging (InI) can achieve 100. ms temporal resolution with whole brain coverage. This is achieved by trading off partition encoding steps and thus spatial resolution for a higher acquisition rate. The reduced spatial information is estimated by solving under-determined inverse problems using RF coil sensitivity information. Here we propose multi projection inverse imaging (mInI) to combine different projection images to improve the spatial resolution of InI. Specifically, coronal, sagittal, and transverse projection images were acquired from different runs of the fMRI acquisitions using a 32-channel head coil array. Simulations show that mInI improves the quality of the instantaneous image reconstruction significantly. Going from one projection to three projections, the spatial resolution quantified by the full width at half maximum of the point-spread function (PSF) is improved from 2.6 pixels to 1.4 pixels (4. mm nominal resolution per pixel). Considering the shape of the PSF, the effective spatial resolution is improved from 16.9 pixels to 4.7 pixels. In vivo fMRI experiments using a two-choice reaction time tasks show visual and sensorimotor cortical activities spatially consistent with typical EPI data, yet mInI offers 100. ms temporal resolution with the whole brain coverage. The mInI data with three projections revealed that the sensorimotor cortex was activated 700. ms after the visual cortex. mInI can be applied to BOLD-contrast fMRI experiments to characterize the dynamics of the activated brain areas with a high spatiotemporal resolution.

AB - Using highly parallel radiofrequency (RF) detection, magnetic resonance inverse imaging (InI) can achieve 100. ms temporal resolution with whole brain coverage. This is achieved by trading off partition encoding steps and thus spatial resolution for a higher acquisition rate. The reduced spatial information is estimated by solving under-determined inverse problems using RF coil sensitivity information. Here we propose multi projection inverse imaging (mInI) to combine different projection images to improve the spatial resolution of InI. Specifically, coronal, sagittal, and transverse projection images were acquired from different runs of the fMRI acquisitions using a 32-channel head coil array. Simulations show that mInI improves the quality of the instantaneous image reconstruction significantly. Going from one projection to three projections, the spatial resolution quantified by the full width at half maximum of the point-spread function (PSF) is improved from 2.6 pixels to 1.4 pixels (4. mm nominal resolution per pixel). Considering the shape of the PSF, the effective spatial resolution is improved from 16.9 pixels to 4.7 pixels. In vivo fMRI experiments using a two-choice reaction time tasks show visual and sensorimotor cortical activities spatially consistent with typical EPI data, yet mInI offers 100. ms temporal resolution with the whole brain coverage. The mInI data with three projections revealed that the sensorimotor cortex was activated 700. ms after the visual cortex. mInI can be applied to BOLD-contrast fMRI experiments to characterize the dynamics of the activated brain areas with a high spatiotemporal resolution.

KW - Event-related

KW - FMRI

KW - InI

KW - Inverse problem

KW - Motor

KW - MRI

KW - Projection

KW - Visual

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U2 - 10.1016/j.neuroimage.2012.01.115

DO - 10.1016/j.neuroimage.2012.01.115

M3 - Article

C2 - 22326985

AN - SCOPUS:84859173687

VL - 61

SP - 304

EP - 313

JO - NeuroImage

JF - NeuroImage

SN - 1053-8119

IS - 1

ER -

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