# Supplementary data for “Individual head models for estimating the TMS-induced electric field in rat brain”

## Description

Supplementary data for “Individual head models for estimating the TMS-induced electric field in rat brain”. This dataset contains the raw imaging data and an individual volume conductor model (VCM) derived from the imaging data. The dataset contains following items: 1. A high-resolution X-ray tomography image of the head and neck region of a 617 g male Wistar rat (CT_rat_Aivi_2017.nii a NIFTI file) by Kimmo Jokivarsi, 2. Two computational TMS-coil models used in to compute TMS-induced E-field in the work (coils.mat a MATLAB binary data file format), 3. The set of 35 target coordinate systems in a 7 by 5 grid that were used in the work (coordinates.mat a MATLAB binary data file format), 4. The set of BEM surface meshes produced from the tomography image for the work (for one 1C model, two 2C models, and one 3C model; meshes.mat a MATLAB binary data file format), and 5. The TMS-induced E-field computed in the 3C model (lead_field_3C_reference.mat a MATLAB binary data file format). This field has been computed for each of the 35 targets in 10 degree increments from –80 degrees to 90 degrees. Due to symmetry, the remaining orientations from 100 to 270 degrees can be generated from these by changing the sign of the E-field. The E-field is presented as a lead-field matrix, where the rows are {position_1_orientation_1, position_1_orientation_2, ..., position_1_orientation_18, position_2_orientation_1, ...} and columns are {brain_mesh_vertex_1_x, brain_mesh_vertex_1_y, brain_mesh_vertex_1_z, brain_mesh_vertex_2_x, ...}.

## Files

## Steps to reproduce

The X-ray imaging parameters are described in the source of the dataset. This source further contains a step-by-step instruction for deriving the surface meshes from such imaging data, and describes computational method used to derive the TMS-induced E-field data from these surface meshes (given the computational coil models included in this dataset).