Lamb waves and adaptive beamforming for aberration correction in medical ultrasound imaging
Loading...
Authors
Author (Corporation)
Publication date
06.07.2020
Typ of student thesis
Course of study
Type
01A - Journal article
Editors
Editor (Corporation)
Supervisor
Parent work
IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control
Special issue
DOI of the original publication
Link
Series
Series number
Volume
68
Issue / Number
1
Pages / Duration
84-91
Patent number
Publisher / Publishing institution
IEEE
Place of publication / Event location
Edition
Version
Programming language
Assignee
Practice partner / Client
Abstract
Phase aberration in transcranial ultrasound imaging (TUI) caused by the human skull leads to an inaccurate image reconstruction. In this article, we present a novel method for estimating the speed of sound and an adaptive beamforming technique for phase aberration correction in a flat polyvinylchloride (PVC) slab as a model for the human skull. First, the speed of sound of the PVC slab is found by extracting the overlapping quasi-longitudinal wave velocities of symmetrical Lamb waves in the frequency-wavenumber domain. Then, the thickness of the plate is determined by the echoes from its front and back side. Next, an adaptive beamforming method is developed, utilizing the measured sound speed map of the imaging medium. Finally, to minimize reverberation artifacts caused by strong scatterers (i.e., needles), a dual probe setup is proposed. In this setup, we image the medium from two opposite directions, and the final image can be the minimum intensity projection of the inherently co-registered images of the opposed probes. Our results confirm that the Lamb wave method estimates the longitudinal speed of the slab with an error of 3.5% and is independent of its shear wave speed. Benefiting from the acquired sound speed map, our adaptive beamformer reduces (in real time) a mislocation error of 3.1, caused by an 8 mm slab, to 0.1 mm. Finally, the dual probe configuration shows 7 dB improvement in removing reverberation artifacts of the needle, at the cost of only 2.4-dB contrast loss. The proposed image formation method can be used, e.g., to monitor deep brain stimulation procedures and localization of the electrode(s) deep inside the brain from two temporal bones on the sides of the human skull.
Keywords
Adaptive beamforming, Deep brain stimulation (DBS), Lamb waves, Sound speed map, Transcranial ultrasound imaging (TUI)
Subject (DDC)
Event
Exhibition start date
Exhibition end date
Conference start date
Conference end date
Date of the last check
ISBN
ISSN
0885-3010
1525-8955
2373-7840
1525-8955
2373-7840
Language
English
Created during FHNW affiliation
Yes
Strategic action fields FHNW
Publication status
Published
Review
Peer review of the complete publication
Open access category
License
Citation
Mozaffarzadeh, M., Minonzio, C., de Jong, N., Verweij, M., Hemm-Ode, S., & Daeichin, V. (2020). Lamb waves and adaptive beamforming for aberration correction in medical ultrasound imaging. IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control, 68(1), 84–91. https://doi.org/10.1109/TUFFC.2020.3007345