Nine minutes is enough: An accelerated fMRI protocol for reliable connectivity mapping in healthy young adults.
- 1Faculty of Mathematics and Computer Science, Nicolaus Copernicus University, Toruń, Poland.
- 2Institute of Advanced Studies, Nicolaus Copernicus University, Toruń, Poland.
- 3Faculty of Medicine, Bydgoszcz University of Science and Technology, Bydgoszcz, Poland.
Abstract
Introduction
Resting‑state fMRI is widely used to map brain connectivity, yet the field lacks a clear, data‑driven standard for acquisition duration. We compared traditional Single‑Band (SB) imaging with an accelerated Multiband factor 4 (MB4) protocol to identify a time‑efficient approach for capturing stable network topology.Methods
Twenty‑five healthy young adults completed two sessions one month apart, each including counterbalanced 13‑minute SB and MB4 scans. Test-retest reliability was evaluated across multiple durations using Portrait Divergence, a multiscale graph‑theoretic metric. Supplementary analyses compared Portrait Divergence with the field-standard Intraclass Correlation Coefficient, assessed robustness across preprocessing pipelines and parcellation schemes, and examined MB4's ability to capture both cortical and subcortical connectivity.Results
MB4 consistently outperformed SB across all tested durations, with peak topological stability at 9 minutes. Stability declined beyond this point, likely due to cumulative motion artefacts. Supplementary analyses confirmed MB4's robustness across preprocessing strategies and atlas choices and demonstrated effective whole‑brain coverage.Conclusions
In healthy young adults, MB4 captures network topology more effectively than SB and reaches peak stability at 9 minutes before declining, challenging the assumption that longer scans are always better. These findings require validation in clinical, paediatric, and geriatric cohorts.
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BibTeX
@article{falkowski2026nine,
title = {{Nine minutes is enough: An accelerated fMRI protocol for reliable connectivity mapping in healthy young adults.}},
author = {Adrian Falkowski and Krzysztof Szwed},
journal = {Dialogues in clinical neuroscience},
year = {2026},
month = oct,
doi = {10.1080/19585969.2026.2710912},
url = {https://europepmc.org/article/MED/42872790},
note = {CC BY},
}
RIS
TY - JOUR
TI - Nine minutes is enough: An accelerated fMRI protocol for reliable connectivity mapping in healthy young adults.
AU - Adrian Falkowski
AU - Krzysztof Szwed
PY - 2026
DA - 2026/10/14
JO - Dialogues in clinical neuroscience
DO - 10.1080/19585969.2026.2710912
UR - https://europepmc.org/article/MED/42872790
AB - Introduction Resting‑state fMRI is widely used to map brain connectivity, yet the field lacks a clear, data‑driven standard for acquisition duration. We compared traditional Single‑Band (SB) imaging with an accelerated Multiband factor 4 (MB4) protocol to identify a time‑efficient approach for capturing stable network topology.Methods Twenty‑five healthy young adults completed two sessions one month apart, each including counterbalanced 13‑minute SB and MB4 scans. Test-retest reliability was evaluated across multiple durations using Portrait Divergence, a multiscale graph‑theoretic metric. Supplementary analyses compared Portrait Divergence with the field-standard Intraclass Correlation Coefficient, assessed robustness across preprocessing pipelines and parcellation schemes, and examined MB4's ability to capture both cortical and subcortical connectivity.Results MB4 consistently outperformed SB across all tested durations, with peak topological stability at 9 minutes. Stability declined beyond this point, likely due to cumulative motion artefacts. Supplementary analyses confirmed MB4's robustness across preprocessing strategies and atlas choices and demonstrated effective whole‑brain coverage.Conclusions In healthy young adults, MB4 captures network topology more effectively than SB and reaches peak stability at 9 minutes before declining, challenging the assumption that longer scans are always better. These findings require validation in clinical, paediatric, and geriatric cohorts.
SN - 1294-8322
SN - 1958-5969
ER -