In this paper, we present an innovative radiating system able to produce a focused treatment for transcranial magnetic stimulation applications. The proposed configuration is based on a non-diffractive Bessel Beam launcher as radiating device. The launcher consists in five concentric planar spiral coils, working at 3 kHz, singularly fed with a proper current amplitude and phase. In this way, a Bessel-like non-diffractive magnetic field distribution can be recreated so that a focused induced electric field inside tissues can be generated. Such peculiar field distribution can find interesting applications for Transcranial magnetic stimulation (TMS), since extremely focused and accurate stimulation can be performed. The numerical results obtained through full-wave simulations show a good spatial resolution and focalization, in term of induced electrical field inside brain tissues at different depths. Such preliminary results suggest the possibility to overcome the single coil performance, encouraging further analysis. Therefore, Bessel beam launchers are potentially good candidates as radiating systems to improve the TMS performance and clinical effectiveness
Bessel Beam Radiating System for Focused Transcranial Magnetic Stimulation
Rotundo, Sabrina;Brizi, Danilo;Monorchio, Agostino
2022-01-01
Abstract
In this paper, we present an innovative radiating system able to produce a focused treatment for transcranial magnetic stimulation applications. The proposed configuration is based on a non-diffractive Bessel Beam launcher as radiating device. The launcher consists in five concentric planar spiral coils, working at 3 kHz, singularly fed with a proper current amplitude and phase. In this way, a Bessel-like non-diffractive magnetic field distribution can be recreated so that a focused induced electric field inside tissues can be generated. Such peculiar field distribution can find interesting applications for Transcranial magnetic stimulation (TMS), since extremely focused and accurate stimulation can be performed. The numerical results obtained through full-wave simulations show a good spatial resolution and focalization, in term of induced electrical field inside brain tissues at different depths. Such preliminary results suggest the possibility to overcome the single coil performance, encouraging further analysis. Therefore, Bessel beam launchers are potentially good candidates as radiating systems to improve the TMS performance and clinical effectivenessI documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
