A rapid beam simulation framework for transcranial focused ultrasound

Area of Science:

• Neurosurgery
• Medical Imaging
• Biomedical Engineering

Background:

• Transcranial focused ultrasound (tFUS) is a non-invasive therapeutic method for essential tremor.
• It works by focusing energy beams to heat and ablate tissue in the thalamus.
• Accurate prediction of the focal spot is crucial for treatment efficacy and safety.

Purpose of the Study:

• To develop and validate a rapid 3D numeric simulation framework.
• To predict focal spot characteristics, including position and temperature rise, before tFUS application.
• To assess the framework's relevance for other therapeutic ultrasound applications.

Main Methods:

• Developed a rapid 3D numeric simulation framework for tFUS.
• Compared simulation predictions with MR thermometry data from essential tremor treatments.
• Validated focal spot position prediction and patient-specific temperature rise prediction.

Main Results:

• The simulation framework accurately predicted focal spot position.
• Patient-specific calibration allowed for prediction of focal spot temperature rise.
• Preliminary data indicated the simulation of lateral focal spot smearing is possible.

Conclusions:

• The validated 3D simulation framework enables accurate prediction of tFUS focal spot characteristics.
• This tool can enhance precision in essential tremor treatment and potentially other therapeutic ultrasound applications.
• The framework offers a valuable method for pre-treatment planning and safety assessment in neuromodulation.