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Abstract #2666

TR(acking) individuals down: Exploring the effect of temporal resolution in resting-state fingerprinting

Barbara Cassone1, Francesca Saviola1, Stefano Tambalo1, Enrico Amico2,3, Dimitri Van De Ville3,4, and Jorge Jovicich1
1CIMeC, University of Trento, Trento, Italy, 2Institute of Bioengineering, Center for Neuroprosthetics, EPFL, Geneva, Switzerland, 3Department of Radiology and Medical Informatics, University of Geneva, Geneva, Switzerland, 4Institute of Bioengineering, EPFL, Lausanne, Switzerland

Synopsis

Keywords: Brain Connectivity, fMRI (resting state)Brain fingerprints reside in timescale-specific functional connectivity of specific regions. However, the effect of acquisition’s temporal resolution on fingerprinting is unknown. Here, we manipulated repetition time (TR) in resting-state fMRI acquisitions, and observed that subject identifiability was maximized when using fast (TR = 0.5 s) or slow (TR = 3 s) protocols, and decreased with TR = 0.7, 1 or 2 s. Moreover, while high-level association areas gave the highest contribution to individual fingerprinting regardless of TR, low-level sensorimotor areas were mostly involved in discriminating between acquisitions with different TRs.

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Keywords