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. 2016 Oct 5;7(11):4424–4440. doi: 10.1364/BOE.7.004424

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Published by The Optical Society under the terms of the Creative Commons Attribution 4.0 License. Further distribution of this work must maintain attribution to the author(s) and the published article’s title, journal citation, and DOI.

Published by The Optical Society under the terms of the Creative Commons Attribution 4.0 License. Further distribution of this work must maintain attribution to the author(s) and the published article’s title, journal citation, and DOI.

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Fig. 2 — The interface between the system and the subject. (a) 3D printed optode holder. (b) Four source fibre bundles and 12 detector fibre bundles fixed on the optode holder on a solid phantom. (c) Illustration showing one complete acquisition cycle during which each of the two pairs of the source fibre bundles delivers light one after the other. (d) The optode holder with fibre bundles is fixed on a subject forehead using a headband.