ArticleScientific reports2021
Using carpet plots to analyze transit times of low frequency oscillations in resting state fMRI.
Article in Scientific reports, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 4 papers.
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4 citing papers in PubMed.
- Quantitative evaluation of low-frequency oscillations using real-time phase-contrast MRI during drowsiness.Fluids and barriers of the CNS · 2025Article
- Effects of clamping end-tidal CONMR in biomedicine · 2024Article
- Transfer function analysis assesses resting cerebral perfusion metrics using hypoxia-induced deoxyhemoglobin as a contrast agent.Frontiers in physiology · 2023Article
- Using carpet plots to analyze blood transit times in the brain during hypercapnic challenge magnetic resonance imaging.Frontiers in physiology · 2023Article
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6 authors.
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Abstract
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 CO
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