Laser generated ultrasound sources using polymer nanocomposites for high frequency metrology

Accurate characterisation of ultrasound fields generated by diagnostic and therapeutic transducers is critical for patient safety. This requires hydrophones calibrated to a traceable standard. The existing implementation of the primary standard at the National Measurement Institutes, e.g., NPL and P...

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Bibliographic Details
Published in2017 IEEE International Ultrasonics Symposium (IUS) p. 1
Main Authors Rajagopal, Srinath, Sainsbury, Toby, Treeby, Bradley, Cox, Ben
Format Conference Proceeding
LanguageEnglish
Published IEEE 01.09.2017
Subjects
Calibration
Measurement by laser beam
Polymers
Sonar equipment
Ultrasonic imaging
Ultrasonic variables measurement
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Summary:Accurate characterisation of ultrasound fields generated by diagnostic and therapeutic transducers is critical for patient safety. This requires hydrophones calibrated to a traceable standard. The existing implementation of the primary standard at the National Measurement Institutes, e.g., NPL and PTB, can provide accurate calibration to a maximum frequency of 40MHz. However, the increasing use of high frequencies for both imaging and therapy necessitates calibrations to frequencies well beyond this range. For this to be possible, a source of high amplitude, broadband, quasi-planar and stable ultrasound fields is required. This is difficult to achieve using conventional piezoelectric sources, but laser generated ultrasound is a promising technique in this regard. In this study various polymer-carbon nanotube nanocomposites (PNC) were fabricated and tested for their suitability for such an application.
ISSN:1948-5727
DOI:10.1109/ULTSYM.2017.8091730