Transcranial Ultrasound Using Leaky Lamb Waves by Wedge Transducer Array
- Authors
- Kang,Ki Chang; Kim,Young Hun; Park, Kwan Kyu; Firouzi,Kamyar; Burtus T. Khuri-Yakub
- Issue Date
- Sep-2020
- Publisher
- IEEE
- Keywords
- Transcranial ultrasound stimulation; Lamb waves; Wedge transducer; Dual-mode conversion
- Citation
- Proceeding of IEEE International Ultrasonics Symposium, pp.1 - 4
- Indexed
- OTHER
- Journal Title
- Proceeding of IEEE International Ultrasonics Symposium
- Start Page
- 1
- End Page
- 4
- URI
- https://scholarworks.bwise.kr/hanyang/handle/2021.sw.hanyang/192449
- Abstract
- The transcranial ultrasound technique has been
researched as a non-invasive method for the treatment of brain
tumors, neuromodulation, and the delivery of cancer therapeutics.
Focused ultrasound is one of the most common methods for noninvasive
treatments, but the present technology generally uses an
array of transducers of normal incidence. The general focused
ultrasound technique has high transmission loss and heating of the
skull because of the normal incidence. In this study, we present the
design, analysis, and implementation of a wedge transducer array
consisting of piezoelectric (PZT) ceramic elements for the dualmode
conversion technique, which means that the longitudinal
wave in the wedge is converted to the Lamb wave in the skull and
the Lamb wave is converted to the longitudinal wave in the brain.
This technique enables efficient transmission, reduces heating of
the skull, and extends the focal spot range. We fabricated the
partial wedge transducer and conducted the experiments to
calculate the total transmission loss of this system.
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