Technical note: High-efficient and wireless transcranial ultrasound excitation based on electromagnetic acoustic transducer.

Background: The generation of transcranial ultrasound is usually based on the piezoelectric effect, so it is necessary to attach transducers around the skull. However, the skull will cause serious attenuation and scattering of ultrasound, which makes it particularly difficult for transcranial ultrasound imaging and modulation.

Purpose: In transcranial ultrasound imaging, there is significant attenuation and scattering of ultrasound waves by the skull bone.