NDLI: High Intensity Focused Ultrasound (HIFU) Transducer Characterization Using Acoustic Streaming

Content Provider	The American Society of Mechanical Engineers (ASME) Digital Collection
Author	Hariharan, Prasanna Ronald, A. Robinson Matthew, R. Myers Rupak, K. Banerjee
Copyright Year	2007
Abstract	A new, non-perturbing optical measurement technique was developed to characterize medical ultrasound fields generated by High Intensity Focused Ultrasound (HIFU) transducers using a phenomenon called ‘acoustic streaming’. The acoustic streaming velocity generated by HIFU transducers was measured experimentally using Digital Particle Image Velocimetry (DPIV). The streaming velocity was then calculated numerically using the finite-element method. An optimization algorithm was developed to back-calculate acoustic power and intensity field by minimizing the difference between experimental and numerical streaming velocities. The intensity field and acoustic power calculated using this approach was validated with standard measurement techniques. Results showed that the inverse method was able to predict acoustic power and intensity fields within 10% of the actual value measured using standard techniques, at the low powers where standard methods can be safely applied. This technique is also potentially useful for evaluating medical ultrasound transducers at the higher power levels used in clinical practice.
Sponsorship	Bioengineering Division
Starting Page	757
Ending Page	758
Page Count	2
File Format	PDF
ISBN	0791847985
DOI	10.1115/SBC2007-176653
Conference Proceedings	ASME 2007 Summer Bioengineering Conference
Language	English
Publisher Date	2007-06-20
Publisher Place	Keystone, Colorado, USA
Access Restriction	Subscribed
Subject Keyword	Ultrasonic transducers Optical measurement Transducers Biomedicine Particulate matter Optimization algorithms Acoustics Finite element methods Ultrasound
Content Type	Text
Resource Type	Article

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