Journal article
1–60 MHz measurements in focused acoustic fields using spatial averaging corrections
Ultrasonics, v 40(1), pp 497-501
May 2002
PMID: 12159990
Featured in Collection : UN Sustainable Development Goals @ Drexel
Abstract
The purpose of this research was to develop, implement and verify a measurement technique enabling rapid and dependable characterization of ultrasound hydrophone probes beyond 20 MHz. The technique employs focused acoustic sources to optimize signal-to-noise ratio and spatial averaging correction model to account for the finite aperture of the hydrophone probes. To minimize calibration time, substitution technique was chosen and its applicability was tested up to 60 MHz. The overall uncertainty of the measurements was on the order of ±1 dB. The results are presented for both needle and membrane type PVDF hydrophones having effective diameters ranging from 130–1200 microns. The fundamental limitations of the technique were determined and it is shown that the spatial averaging error is governed by the cross-section of the beam in the focal plane and the ratio of the effective diameters of the reference and tested hydrophone probes. The technique developed is being extended to frequencies beyond 60 MHz.
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Details
- Title
- 1–60 MHz measurements in focused acoustic fields using spatial averaging corrections
- Creators
- E.G Radulescu - Drexel UniversityP.A Lewin - Drexel UniversityA Nowicki - Institute of Fundamental Technological Research
- Publication Details
- Ultrasonics, v 40(1), pp 497-501
- Publisher
- Elsevier
- Number of pages
- 5
- Resource Type
- Journal article
- Language
- English
- Academic Unit
- School of Biomedical Engineering, Science, and Health Systems
- Web of Science ID
- WOS:000176648000087
- Scopus ID
- 2-s2.0-0036557880
- Other Identifier
- 991014877754704721
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InCites Highlights
Data related to this publication, from InCites Benchmarking & Analytics tool:
- Collaboration types
- Domestic collaboration
- International collaboration
- Web of Science research areas
- Acoustics
- Radiology, Nuclear Medicine & Medical Imaging