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NIRStar 14.1 - User Manual

Page 115 of 124

Appendix B. How to Generate a Channel-Layout Grid for an Arbitrary Optode Array

For the example considered in Section 5.4, the optodes were arranged in a manner that corresponded in

a rather straightforward way to a simple checkerboard channel layout (Figure 16). However, the

arrangement of optodes that is best suited to a particular functional imaging study may have a more

irregular character (and a strong point of NIRScout and NIRSport systems is the flexibility they afford

users in the positioning of optodes). For concreteness, here we consider a specific example that came

from a research group interested in collecting data from a region in the back of the subject’s head,

overlying the visual cortex. They used 8 sources and 12 detectors, and arranged them in the pattern

depicted in the following cartoon:

Figure 97: Example of a topographic measurement layout.

Here we present a set of steps that can be used to generate a channel layout for the array shown, and

that has worked as well for every other array tested so far.

D3 S1 D8

S3 D4 D9 S6

S4 D1 S7D6 D11

D5 D10

D7 S2 D12

S5 S8