Implementation of swept synthetic aperture imaging

Nick Bottenus; Marko Jakovljevic; Emad Boctor; Gregg E. Trahey

doi:10.1117/12.2081434

17 March 2015 Implementation of swept synthetic aperture imaging

Nick Bottenus, Marko Jakovljevic, Emad Boctor, Gregg E. Trahey

Author Affiliations +

Proceedings Volume 9419, Medical Imaging 2015: Ultrasonic Imaging and Tomography; 94190H (2015) https://doi.org/10.1117/12.2081434
Event: SPIE Medical Imaging, 2015, Orlando, Florida, United States

Abstract

Ultrasound imaging of deep targets is limited by the resolution of current ultrasound systems based on the available aperture size. We propose a system to synthesize an extended effective aperture in order to improve resolution and target detectability at depth using a precisely-tracked transducer swept across the region of interest. A Field II simulation was performed to demonstrate the swept aperture approach in both the spatial and frequency domains. The adaptively beam-formed system was tested experimentally using a volumetric transducer and an ex vivo canine abdominal layer to evaluate the impact of clutter-generating tissue on the resulting point spread function. Resolution was improved by 73% using a 30.8 degree sweep despite the presence of varying aberration across the array with an amplitude on the order of 100 ns. Slight variations were observed in the magnitude and position of side lobes compared to the control case, but overall image quality was not significantly degraded as compared by a simulation based on the experimental point spread function. We conclude that the swept aperture imaging system may be a valuable tool for synthesizing large effective apertures using conventional ultrasound hardware.

Citation Download Citation

Nick Bottenus, Marko Jakovljevic, Emad Boctor, and Gregg E. Trahey "Implementation of swept synthetic aperture imaging", Proc. SPIE 9419, Medical Imaging 2015: Ultrasonic Imaging and Tomography, 94190H (17 March 2015); https://doi.org/10.1117/12.2081434

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