Journal article
Thermoacoustic sensor for ultrasound power measurements and ultrasonic equipment calibration
Ultrasound in medicine & biology, v 20(4), pp 367-373
1994
PMID: 8085293
Featured in Collection : UN Sustainable Development Goals @ Drexel
Abstract
This paper describes a thermoacoustic sensor developed for measurements of the acoustic power and calibration of ultrasonic transducers in the medical imaging and nondestructive testing frequency range. It is shown that the equilibrium temperature produced by ultrasound absorption in an absorbing material and detected by a copper-constantan thermocouple is proportional to the square of the current applied to the acoustic source. It is also demonstrated that the simultaneous measurement of this current and the corresponding equilibrium temperature at a given frequency allow the transmitting current sensitivity of the acoustic source to be calculated. The sensor thus provides a useful and low-cost alternative to the expensive calibration methods such as those based on the reciprocity technique, the planar scanning technique and the radiation force balance. The principles of the sensor's operation are outlined and its construction and characteristics are described. Experimental data in the frequency range of 1–8 MHz are presented and the advantages and disadvantages of the sensor are discussed.
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Details
- Title
- Thermoacoustic sensor for ultrasound power measurements and ultrasonic equipment calibration
- Creators
- B. Fay - Physikalisch-Technische BundesanstaltM. Rinker - Physikalisch-Technische BundesanstaltP.A. Lewin - Drexel University
- Publication Details
- Ultrasound in medicine & biology, v 20(4), pp 367-373
- Publisher
- Elsevier
- Resource Type
- Journal article
- Language
- English
- Academic Unit
- School of Biomedical Engineering, Science, and Health Systems
- Web of Science ID
- WOS:A1994NT64900005
- Scopus ID
- 2-s2.0-0028277556
- Other Identifier
- 991019173762004721
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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