Table 1.

Summary of the settings to investigate the EF due to differences between the MER stimulation and the DBS contacts.

Investigation	Model	Active Contacts and Stimulation Amplitude	Ground
Grounding the guide tube	2D Axisymmetric	MER stim. contact: 1–4 (mA)	Guide tube or Outer boundaries
Parallel MER leads	3D Homogeneous	MER stim. contact: 1, 3 (mA)	Guide tube
Non-active contacts for DBS	2D Axisymmetric	MER stim. contact: 1, 3 (mA)/DBS C0, C1, C2 or C3: 1, 3 (V)	Guide tube/Outer boundaries
Position of the DBS active contact	3D Patient-specific	MER stim. contact: 1, 3 (mA)/DBS C0 or C1: 1, 3 (V)	Guide tube/Outer boundaries
Clinical case	3D Patient-specific	MER stim. contact: 0.4 mA/DBS C0, C1 or C2: 2, 3 (V)	Guide tube/Outer boundaries