Document Detail

Characterization of ultrasonic transducers using a fiberoptic sensor.
MedLine Citation:
PMID:  7810025     Owner:  NLM     Status:  MEDLINE    
The PVDF (polyvinylidene fluoride) hydrophones, commonly used to measure the characteristics of ultrasonic transducers, suffer from a number of drawbacks. They disturb the field distribution to be measured and cause spatial averaging effects because of their finite aperture. In addition, they are very delicate and susceptible to damage. To overcome some of these problems, the authors previously proposed the use of an optical fiber-based probe to measure the ultrasonic fields. In this paper, this fiberoptic ultrasonic sensor is used to measure the characteristics of six transducers, focused as well as unfocused, covering a frequency range of 2.25 MHz to 20 MHz. Results obtained using the fiberoptic sensor are compared with those obtained using a calibrated PVDF needle hydrophone with an effective diameter of 0.5 mm. The temporal responses as well as the beam profiles of the transducers measured using the fiberoptic sensor show excellent agreement with the results obtained using the PVDF needle hydrophone.
Y Q Wu; P M Shankar; P A Lewin
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Ultrasound in medicine & biology     Volume:  20     ISSN:  0301-5629     ISO Abbreviation:  Ultrasound Med Biol     Publication Date:  1994  
Date Detail:
Created Date:  1995-02-02     Completed Date:  1995-02-02     Revised Date:  2008-11-21    
Medline Journal Info:
Nlm Unique ID:  0410553     Medline TA:  Ultrasound Med Biol     Country:  ENGLAND    
Other Details:
Languages:  eng     Pagination:  645-53     Citation Subset:  IM    
Biomedical Engineering and Science Institute, Drexel University, Philadelphia, PA 19104.
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MeSH Terms
Fiber Optic Technology*
Optical Fibers
Comment In:
Ultrasound Med Biol. 1996;22(1):143-5   [PMID:  8928312 ]

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