High-frequency ultrasound imaging using opto-acoustic arrays

Takashi Buma; James D. Hamilton; M. Spisar; Matthew O'Donnell

doi:10.1117/12.462143

11 April 2002 High-frequency ultrasound imaging using opto-acoustic arrays

Takashi Buma, James D. Hamilton, M. Spisar, Matthew O'Donnell

Proceedings Volume 4687, Medical Imaging 2002: Ultrasonic Imaging and Signal Processing; (2002) https://doi.org/10.1117/12.462143
Event: Medical Imaging 2002, 2002, San Diego, California, United States

Abstract

A promising alternative to piezoelectricity for high frequency array applications is optical generation and detection of ultrasound. An array element is defined by the size and location of a laser beam focused onto a suitable surface. We've built a two-dimensional synthetic receive array, where a HeNe laser probes the surface displacements of a thin reflective membrane. Using a conventional transducer as the ultrasound source, images with near optimal resolution and wide fields of view have been produced at 10 - 50 MHz. We are currently exploring a different form of optical detection where the incident ultrasound modulates the thickness of an etalon (a Fabry-Perot interferometer). Preliminary experiments demonstrate improved sensitivity using a high finesse etalon. Our work in optical generation of ultrasound uses the thermoelastic effect. A major drawback to thermoelastic generation has been poor conversion efficiency. We obtained an increase in conversion efficiency of nearly 20 dB using an optical absorbing film consisting of a mixture of polydimethylsiloxane (PDMS) and carbon black. Radiation pattern measurements indicate that we have produced a 75 MHz two-dimensional array element. These results demonstrate the potential of optoacoustic arrays for high frequency ultrasound imaging.

Citation Download Citation

Takashi Buma, James D. Hamilton, M. Spisar, and Matthew O'Donnell "High-frequency ultrasound imaging using opto-acoustic arrays", Proc. SPIE 4687, Medical Imaging 2002: Ultrasonic Imaging and Signal Processing, (11 April 2002); https://doi.org/10.1117/12.462143

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available