Using carpet plots to analyze transit times of low frequency oscillations in resting state fMRI.
Using carpet plots to analyze transit times of low frequency oscillations in resting state fMRI.
复制标题
DOI：
10.1038/s41598-021-86402-z
复制
发表时间：
2021-03-26
影响因子：
4.6
通讯作者：
Tong Y
中科院分区：
文献类型：
--
作者：
Fitzgerald B;Yao JF;Talavage TM;Hocke LM;Frederick BD;Tong Y
A “carpet plot” is a 2-dimensional plot (time vs. voxel) of scaled fMRI voxel intensity values. Low frequency oscillations (LFOs) can be successfully identified from BOLD fMRI and used to study characteristics of neuronal and physiological activity. Here, we evaluate the use of carpet plots paired with a developed slope-detection algorithm as a means to study LFOs in resting state fMRI (rs-fMRI) data with the help of dynamic susceptibility contrast (DSC) MRI data. Carpet plots were constructed by ordering voxels according to signal delay time for each voxel. The slope-detection algorithm was used to identify and calculate propagation times, or “transit times”, of tilted vertical edges across which a sudden signal change was observed. We aim to show that this metric has applications in understanding LFOs in fMRI data, possibly reflecting changes in blood flow speed during the scan, and for evaluating alternative blood-tracking contrast agents such as inhaled CO2. We demonstrate that the propagations of LFOs can be visualized and automatically identified in a carpet plot as tilted lines of sudden intensity change. Resting state carpet plots produce edges with transit times similar to those of DSC carpet plots. Additionally, resting state carpet plots indicate that edge transit times vary at different time points during the scan.
登录
查看更多内容
皮层的证据表明唤醒对脑活动的fMRI研究的贡献。
影响因子：
16.6
作者：
Liu X;de Zwart JA;Schölvinck ML;Chang C;Ye FQ;Leopold DA;Duyn JH
通讯作者：
Duyn JH
影响因子：
5.7
作者：
Chang C;Metzger CD;Glover GH;Duyn JH;Heinze HJ;Walter M
通讯作者：
Walter M
影响因子：
6.3
作者：
Fisher, Joseph A.
通讯作者：
Fisher, Joseph A.
DOI：
10.1073/pnas.1520613113
发表时间：
2016-04-19
影响因子：
11.1
作者：
Chang, Catie;Leopold, David A.;Duyn, Jeff H.
通讯作者：
Duyn, Jeff H.
影响因子：
2.9
作者：
Hoffmann, O;Weih, M;Valdueza, M
通讯作者：
Valdueza, M