= Digitize EEG sensor locations and head shape using 3D Scanners (UNDER CONSTRUCTION) =
''Authors: Yash Shashanka Vakilna, Wayne Mead, Anand Joshi, Chinmay Chinara, Takfarinas Medani, Raymundo Cassani''

<<TableOfContents(4,2)>>

== Background ==
EEG allows the monitoring and recording of electrical brain activity from multiple electrodes placed on the scalp. EEG-based cortical current density mapping requires accurate knowledge of the locations of the electrodes on the scalp. The number and placement of electrodes vary from a few to high-density models with hundreds of electrodes. Researchers and clinicians have developed some solutions for precise electrode localization. The most common approach uses an electromagnetic digitizer (e.g. [[https://neuroimage.usc.edu/brainstorm/Tutorials/TutDigitize|Polhemus]]). However, these methods are typically not easy to use, require skilled technicians, and the procedures are time-consuming and subject to errors.

This study presents [[https://www.revopoint3d.com/products/handheld-3d-scanner-range|Revopoint]], an affordable and advanced 3D scanner that uses structured light approach for mapping the scalp surface and automatically identifying each electrode's 3D location and label.

== The Hardware ==
Revopoint hardware package comes with the 3D Scanner with tripod and a USB-C cable.<<BR>> {{attachment:revopoint_range2_scanner.png||width="500"}} <<BR>><TODO: more about the hardware>

== System requirements ==
 1. Windows: Windows 10/11 (64-bit)
 1. RAM: 8 GB or better
 1. Processor: Intel Core i5 10th Generation or better
 1. Mac OS X: 10.7+

== Revo Scan software ==
Revopoint uses the '''[[https://www.revopoint3d.com/pages/support-download|Revo Scan]]''' software to do the scanning of a subject wearing EEG cap and generate a 3D mesh. This mesh can then be imported into Brainstorm to automatically detect and label the electrodes in it.

=== Installation ===
 1. Download the software from their [[https://www.revopoint3d.com/pages/support-download|webpage]] based on your Operating System (OS).<<BR>><<BR>> {{attachment:revoscan1.png||width="400"}}
 1. Install it by keeping the defaults. After it has finished installing click on '''Complete'''.<<BR>><<BR>> {{attachment:revoscan2.png||width="300"}}

=== Running the software ===
==== Pre scanning setup ====
 1. 

==== Scanning ====
 1.

==== Saving and exporting ====
 1.

== Digitize using Revopoint GUI in Brainstorm ==
<TODO>

== Automated process ==
<TODO>