Quantifying the Microvascular Origin of BOLD-fMRI from First Principles with Two-Photon Microscopy and an Oxygen-Sensitive Nanoprobe
書誌事項
- 公開日
- 2015-02-25
- 権利情報
-
- https://creativecommons.org/licenses/by-nc-sa/4.0/
- DOI
-
- 10.1523/jneurosci.3555-14.2015
- 公開者
- Society for Neuroscience
この論文をさがす
説明
<jats:p>The blood oxygenation level-dependent (BOLD) contrast is widely used in functional magnetic resonance imaging (fMRI) studies aimed at investigating neuronal activity. However, the BOLD signal reflects changes in blood volume and oxygenation rather than neuronal activity per se. Therefore, understanding the transformation of microscopic vascular behavior into macroscopic BOLD signals is at the foundation of physiologically informed noninvasive neuroimaging. Here, we use oxygen-sensitive two-photon microscopy to measure the BOLD-relevant microvascular physiology occurring within a typical rodent fMRI voxel and predict the BOLD signal from first principles using those measurements. The predictive power of the approach is illustrated by quantifying variations in the BOLD signal induced by the morphological folding of the human cortex. This framework is then used to quantify the contribution of individual vascular compartments and other factors to the BOLD signal for different magnet strengths and pulse sequences.</jats:p>
収録刊行物
-
- The Journal of Neuroscience
-
The Journal of Neuroscience 35 (8), 3663-3675, 2015-02-25
Society for Neuroscience
