Phase Aberration Correction in Transcranial Ultrasound Imaging using Averaged Sound Velocity Map in Delay-and-Sum Beamformer

Conference paper (2019)

Authors

M. Mozaffarzadeh ImPhys/Medical Imaging - AS
C.G. Minonzio ImPhys/Medical Imaging - AS
M.D. Verweij ImPhys/Verweij group - AS
Simone Hemm University of Applied Sciences and Arts Northwestern Switzerland
V. Daeichin ImPhys/Medical Imaging - AS
Research Group
ImPhys/Verweij group (AS) (TU Delft)
Adaptive beamforming Aberration Deep brain stimulation Transcranial ultrasound imaging Phase compensation
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Published Date

2019

Language

English

Reuse Rights

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Faculty

Applied Sciences

Department

ImPhys/Imaging Physics

Research Group

ImPhys/Verweij group

Abstract

Deep brain stimulation (DBS) is used to modify the brain function. Localization of the electrode(s) used in DBS is an important mater since the success of the treatment highly depends on it. Transcranial ultrasound imaging (TUI) can be a proper candidate to monitor the electrode(s), but it is affected by the phase aberration caused by the skull bone. To address this issue, in this paper, we propose a novel beamforming method based on the sound velocity map of the imaging medium. For each combination of the imaging grid and element of the array, an averaged sound speed (ASD) is calculated. Then, the ASD is used inside a delay-and-sum beamforming method. The numerical results show that the proposed method compensates the phase aberration caused by the skull having a thickness of 5 mm with a sound speed twice of the imaging medium (i.e., water). The proposed method can be implemented in a real-time manner, which makes it a great candidate to be used in operation rooms for surgeries.