FRINK Linked Data Fragments server

Matches in SemOpenAlex for { <https://semopenalex.org/work/W3193693384> ?p ?o ?g. }

• W3193693384 endingPage "118467" @default.
• W3193693384 startingPage "118467" @default.
• W3193693384 abstract "The blood oxygenation level-dependent (BOLD) contrast mechanism allows the noninvasive monitoring of changes in deoxyhemoglobin content. As such, it is commonly used in functional magnetic resonance imaging (fMRI) to study brain activity since levels of deoxyhemoglobin are indirectly related to local neuronal activity through neurovascular coupling mechanisms. However, the BOLD signal is severely affected by physiological processes as well as motion. Due to this, several noise correction techniques have been developed to correct for the associated confounds. The present study focuses on cardiac pulsatility fMRI confounds, aiming to refine model-based techniques that utilize the photoplethysmograph (PPG) signal. Specifically, we propose a new technique based on convolution filtering, termed cardiac pulsatility model (CPM) and compare its performance with the cardiac-related RETROICOR (Card-RETROICOR), which is a technique commonly used to model fMRI fluctuations due to cardiac pulsatility. Further, we investigate whether variations in the amplitude of the PPG pulses (PPG-Amp) covary with variations in amplitude of pulse-related fMRI fluctuations, as well as with the systemic low frequency oscillations (SLFOs) component of the fMRI global signal (GS - defined as the mean signal across all gray matter voxels). Capitalizing on 3T fMRI data from the Human Connectome Project, CPM was found to explain a significantly larger fraction of the fMRI signal variance compared to Card-RETROICOR, particularly for subjects with larger heart rate variability during the scan. The amplitude of the fMRI pulse-related fluctuations did not covary with PPG-Amp; however, PPG-Amp explained significant variance in the GS that was not attributed to variations in heart rate or breathing patterns. Our results suggest that the proposed approach can model high-frequency fluctuations due to pulsation as well as low-frequency physiological fluctuations more accurately compared to model-based techniques commonly employed in fMRI studies." @default.
• W3193693384 created "2021-08-30" @default.
• W3193693384 creator A5062820435 @default.
• W3193693384 creator A5081246826 @default.
• W3193693384 date "2021-11-01" @default.
• W3193693384 modified "2023-10-02" @default.
• W3193693384 title "Physiological noise modeling in fMRI based on the pulsatile component of photoplethysmograph" @default.
• W3193693384 cites W1252004326 @default.
• W3193693384 cites W1963582194 @default.
• W3193693384 cites W1964625711 @default.
• W3193693384 cites W1972336901 @default.
• W3193693384 cites W1972690852 @default.
• W3193693384 cites W1974789438 @default.
• W3193693384 cites W1980037751 @default.
• W3193693384 cites W1981804517 @default.
• W3193693384 cites W1983208069 @default.
• W3193693384 cites W1983930872 @default.
• W3193693384 cites W1986387796 @default.
• W3193693384 cites W1986825222 @default.
• W3193693384 cites W1993173822 @default.
• W3193693384 cites W2002271924 @default.
• W3193693384 cites W2002660165 @default.
• W3193693384 cites W2003666876 @default.
• W3193693384 cites W2009494091 @default.
• W3193693384 cites W2013479466 @default.
• W3193693384 cites W2020333990 @default.
• W3193693384 cites W2021260330 @default.
• W3193693384 cites W2022925177 @default.
• W3193693384 cites W2024729467 @default.
• W3193693384 cites W2024955728 @default.
• W3193693384 cites W2028084402 @default.
• W3193693384 cites W2029995174 @default.
• W3193693384 cites W2030545123 @default.
• W3193693384 cites W2031019611 @default.
• W3193693384 cites W2033865693 @default.
• W3193693384 cites W2047453615 @default.
• W3193693384 cites W2048034803 @default.
• W3193693384 cites W2049325056 @default.
• W3193693384 cites W2063719978 @default.
• W3193693384 cites W2064658153 @default.
• W3193693384 cites W2071714163 @default.
• W3193693384 cites W2072858761 @default.
• W3193693384 cites W2075109859 @default.
• W3193693384 cites W2078880430 @default.
• W3193693384 cites W2083872334 @default.
• W3193693384 cites W2090687144 @default.
• W3193693384 cites W2091108618 @default.
• W3193693384 cites W2095520332 @default.
• W3193693384 cites W2096672020 @default.
• W3193693384 cites W2102398394 @default.
• W3193693384 cites W2106822401 @default.
• W3193693384 cites W2107444050 @default.
• W3193693384 cites W2111609296 @default.
• W3193693384 cites W2116198322 @default.
• W3193693384 cites W2120546516 @default.
• W3193693384 cites W2123586737 @default.
• W3193693384 cites W2128210501 @default.
• W3193693384 cites W2130010412 @default.
• W3193693384 cites W2131174847 @default.
• W3193693384 cites W2131488240 @default.
• W3193693384 cites W2136543288 @default.
• W3193693384 cites W2136573752 @default.
• W3193693384 cites W2138092999 @default.
• W3193693384 cites W2145403933 @default.
• W3193693384 cites W2148726987 @default.
• W3193693384 cites W2149153247 @default.
• W3193693384 cites W2149240084 @default.
• W3193693384 cites W2157446241 @default.
• W3193693384 cites W2170117095 @default.
• W3193693384 cites W2285908327 @default.
• W3193693384 cites W2414014505 @default.
• W3193693384 cites W2507387536 @default.
• W3193693384 cites W2512138671 @default.
• W3193693384 cites W2537382818 @default.
• W3193693384 cites W2556623269 @default.
• W3193693384 cites W2557111525 @default.
• W3193693384 cites W2560079766 @default.
• W3193693384 cites W2563386392 @default.
• W3193693384 cites W2588517580 @default.
• W3193693384 cites W2597348720 @default.
• W3193693384 cites W2616216465 @default.
• W3193693384 cites W2759050422 @default.
• W3193693384 cites W2760212863 @default.
• W3193693384 cites W2801999791 @default.
• W3193693384 cites W2885225461 @default.
• W3193693384 cites W2901166225 @default.
• W3193693384 cites W2904978207 @default.
• W3193693384 cites W2944301239 @default.
• W3193693384 cites W2949139184 @default.
• W3193693384 cites W2949346018 @default.
• W3193693384 cites W2950870790 @default.
• W3193693384 cites W2953090092 @default.
• W3193693384 cites W2962527742 @default.
• W3193693384 cites W2963192067 @default.
• W3193693384 cites W2966154809 @default.
• W3193693384 cites W2971977987 @default.
• W3193693384 cites W2977883299 @default.
• W3193693384 cites W2982626951 @default.

• next