Conference proceeding
Development of a High Intensity Focused Ultrasound (HIFU) Hydrophone System
8TH INTERNATIONAL SYMPOSIUM ON THERAPEUTIC ULTRASOUND, v 1113(1), pp 301-305
01 Jan 2009
Featured in Collection : UN Sustainable Development Goals @ Drexel
Abstract
The growing clinical use of High Intensity Focused Ultrasound (HIFU) has driven a need for reliable, reproducible measurements of HIFU acoustic fields. We have previously presented data on a reflective scatterer approach, incorporating several novel features for improved bandwidth, reliability, and reproducibility [Proc. 2005 IEEE Ultrasonics Symposium, 1739-1742]. We now report on several design improvements which have increase the signal to noise ratio of the system, and potentially reduced the cost of implementation. For the scattering element, we now use an artificial sapphire material to provide a more uniform radiating surface. The receiver is a segmented, truncated spherical structure with a 10cm radius; the scattering element is positioned at the center of the sphere. The receiver is made from 25 micron thick, biaxially stretched PVDF, with a Pt-Au electrode on the front surface. In the new design, a specialized backing material provides the stiffness required to maintain structural stability, while at the same time providing both electrical shielding and ultrasonic absorption. Compared with the previous version, the new receiver design has improved the noise performance by 8-12dB; the new scattering sphere has reduced the scattering loss by another 14dB, producing an effective sensitivity of -298 dB re 1 microVolt/Pa. The design trade-off still involves receiver sensitivity with effective spot size, and signal distortion from the scatter structure. However, the reduced cost and improved repeatability of the new scatter approach makes the overall design more robust for routine waveform measurements of HIFU systems.
Metrics
Details
- Title
- Development of a High Intensity Focused Ultrasound (HIFU) Hydrophone System
- Creators
- Mark E. Schafer - Sonic Tech, Inc (United States, Lower Gwynedd)James Gessert - Sonora Medical Systems (United States, Longmont)
- Publication Details
- 8TH INTERNATIONAL SYMPOSIUM ON THERAPEUTIC ULTRASOUND, v 1113(1), pp 301-305
- Conference
- 8th International Symposium on Therapeutic Ultrasound, 8th (Minneapolis, Minnesota, United States, 10 Sep 2008–13 Sep 2008)
- Series
- AIP Conference Proceedings
- Publisher
- American Institute of Physics
- Number of pages
- 2
- Resource Type
- Conference proceeding
- Language
- English
- Academic Unit
- School of Biomedical Engineering, Science, and Health Systems
- Web of Science ID
- WOS:000266425300058
- Scopus ID
- 2-s2.0-67650564615
- Other Identifier
- 991019562015304721
UN Sustainable Development Goals (SDGs)
This publication has contributed to the advancement of the following goals:
InCites Highlights
Data related to this publication, from InCites Benchmarking & Analytics tool:
- Web of Science research areas
- Acoustics
- Engineering, Biomedical
- Radiology, Nuclear Medicine & Medical Imaging