Three-dimensional infrared scanning: An enhanced approach for spatial registration of probes for neuroimaging

Significance: Accurate spatial registration of probes (e.g., optodes and electrodes) for measurement of brain activity is a crucial aspect in many neuroimaging modalities. It may increase measurement precision and enable the transition from channel-based calculations to volumetric representations.
Aim: This technical note evaluates the efficacy of a commercially available infrared three-dimensional (3D) scanner under actual experimental (or clinical) conditions and provides guidelines for its use.
Method: We registered probe positions using an infrared 3D scanner and validated them against magnetic resonance imaging (MRI) scans on five volunteer participants.
Results: Our analysis showed that with standard cap fixation, the average Euclidean distance of probe position among subjects could reach up to 43 mm, with an average distance of 15.25 mm [standard deviation (SD) = 8.0]. By contrast, the average distance between the infrared 3D scanner and the MRI-acquired positions was 5.69 mm (SD..., To estimate the spatial resolution, we registered sensor positions using an infrared 3D registration method and performed MRI scans on five voluntary participants., , # Data from: Three-dimensional infrared scanning: An enhanced approach for spatial registration of probes for neuroimaging

[https://doi.org/10.5061/dryad.h18931zsq](https://doi.org/10.5061/dryad.h18931zsq)

We aim to evaluate the efficacy of an infrared 3D scanner as a potential solution for registering neuroimaging probes on the scalp.

## Description of the data and file structure

To estimate the spatial resolution, we registered sensor positions using an infrared 3D registration method and performed MRI scans on five voluntary participants.

The dataset needs to be unzipped. The data folder contains the infrared 3D scans in an anonymized format (.glb) together with the sensor positions (.pp), labeled in MeshLab. On the anonymized MRI scans, the segmented brain and the position of the nitroglycerin markers were shared (.nii.gz) together with the sensor positions (.json), labeled in Slicer.

## Code/Software

We provide the necessary source code for anatomical mapping and integration...