Generation of wide-directivity broadband ultrasound by short
laser pulses

André Conjusteau; Vyacheslav V. Nadvoretskiy; Sergey A. Ermilov; Alexander A. Oraevsky

doi:10.1117/12.2008869

4 March 2013 Generation of wide-directivity broadband ultrasound by short laser pulses

André Conjusteau, Vyacheslav V. Nadvoretskiy, Sergey A. Ermilov, Alexander A. Oraevsky

Proceedings Volume 8581, Photons Plus Ultrasound: Imaging and Sensing 2013; 85814U (2013) https://doi.org/10.1117/12.2008869
Event: SPIE BiOS, 2013, San Francisco, California, United States

Abstract

A three-dimensional mouse imaging system combining optoacoustic tomography and laser ultrasound (LOUIS- 3DM) has been developed. It features broadband laser ultrasound emitters positioned opposite an array of transducers. This imaging geometry allows reconstruction of images that either depicts the speed of sound distribution from measured time of flight data, or acoustic attenuation from the measured signal amplitude. We have investigated the performance of two laser ultrasound source designs, both easily adaptable to a commercial imaging system: small diameter source (600 μm) generated off a flat surface, and larger diameter (3 mm) spherical source. Laser energy requirements are modest, well below 1 mJ per pulse for either design. Their performance at normal incidence is comparable both in amplitude and frequency response. However, off-axis generation differs dramatically and the shortcomings of the simple flat emitter design are evident. We show that, in order to achieve optimal performance through proper illumination of the detector array, spherical wave front characteristics are desired.

Citation Download Citation

André Conjusteau, Vyacheslav V. Nadvoretskiy, Sergey A. Ermilov, and Alexander A. Oraevsky "Generation of wide-directivity broadband ultrasound by short laser pulses", Proc. SPIE 8581, Photons Plus Ultrasound: Imaging and Sensing 2013, 85814U (4 March 2013); https://doi.org/10.1117/12.2008869

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