Pubblicazioni

Transcranial Magnetic Stimulation: An Automated Procedure to Obtain Coil-specific Models for Field Calculations

KH, Madsen; L, Ewald; HR, Siebner; A, Thielscher

Abstract:

BACKGROUND: Field calculations for transcranial magnetic stimulation (TMS) are increasingly implemented online in neuronavigation systems and in more realistic offline approaches based on finite-element methods. They are often based on simplified and/or non-validated models of the magnetic vector potential of the TMS coils. OBJECTIVE: To develop an approach to reconstruct the magnetic vector potential based on automated measurements. METHODS: We implemented a setup that simultaneously measures the three components of the magnetic field with high spatial resolution. This is complemented by a novel approach to determine the magnetic vector potential via volume integration of the measured field. RESULTS: The integration approach reproduces the vector potential with very good accuracy. The vector potential distribution of a standard figure-of-eight shaped coil determined with our setup corresponds well with that calculated using a model reconstructed from x-ray images. CONCLUSION: The setup can supply validated models for existing and newly appearing TMS coils.

Patologie/Applicazioni:

• Stimolazione Magnetica Transcranica (TMS)

Anno:

2015

Tipo di pubblicazione:

Articolo

Parola chiave:

stimolazione magnetica transcranica

Testata scientifica:

Brain Stimulation

DOI:

10.1016/j.brs.2015.07.035