Improved diffracting-grating transducers

Peggy Palanchon; David H. R. Vilkomerson; Thomas Chilipka; K. Kirk Shung

doi:10.1117/12.350671

21 June 1999 Improved diffracting-grating transducers

Peggy Palanchon, David H. R. Vilkomerson, Thomas Chilipka, K. Kirk Shung

Proceedings Volume 3664, Medical Imaging 1999: Ultrasonic Transducer Engineering; (1999) https://doi.org/10.1117/12.350671
Event: Medical Imaging '99, 1999, San Diego, CA, United States

Abstract

Diffracting grating transducers are interdigitated grating- like structures of thin elements spaced at a few wavelengths apart. By changing the phase or the frequency of the driving signal, two beams whose angle differs by a known quantity are produced. Doppler measurements in the blood stream at the two beam angles enable the estimation of angle- independent blood velocity. The performance of diffracting grating transducer in term of efficiency and bandwidth has been optimized by finite element analysis. Two different arrays operating at 5 MHz and 10 MHz were fabricated and modeled. The simulated and measured insertion losses for each transducer were compared. To broaden the bandwidth, matching layers were included in the design. The insertion losses for different driving modes were also computed. The results may shed light as to how the performance of the diffracting grating transducer may be improved to make better angle independent Doppler velocity measurements.

Citation Download Citation

Peggy Palanchon, David H. R. Vilkomerson, Thomas Chilipka, and K. Kirk Shung "Improved diffracting-grating transducers", Proc. SPIE 3664, Medical Imaging 1999: Ultrasonic Transducer Engineering, (21 June 1999); https://doi.org/10.1117/12.350671

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