A novel design framework of synthetic radial aperture focusing for volumetric transrectal ultrasound imaging

Author:

Song Hyunwoo1,Kang Jeeun2ORCID,Boctor Emad M12

Affiliation:

1. Department of Computer Science, Whiting School of Engineering, Johns Hopkins University , Baltimore, Maryland 21218, USA

2. Laboratory for Computational Sensing and Robotics, Whiting School of Engineering, Johns Hopkins University , Baltimore, Maryland 21218, USA

Abstract

Abstract In this paper, we present a novel design framework of synthetic radial aperture focusing for three-dimensional (3D) transrectal ultrasound imaging (TRUS-rSAF), in which multiple transmittance/reception events at different scanning angles are synthesized to reconstruct a radial plane in the target volume, securing high spatial resolution and texture uniformity. A theory-based design approach has not been available to push the envelope of the 3D rSAF technique. Herein, a closed-form analytical description of the TRUS-rSAF method is presented for the first time, effectively delineating spatial resolution and grating lobe positions in the radial dimension of a TRUS transducer. We demonstrate a solid optimization workflow based on the theoretical foundation to improve its spatiotemporal resolution, grating lobe artifacts, and signal-to-noise ratio. A specific design criterion was considered to outperform a clinical 3D TRUS imaging as a reference (TRUS-REF), where each radial plane is reconstructed with a single transmittance/reception event using a motorized actuator. The optimized TRUS-rSAF method significantly enhanced spatial resolution up to 50% over the TRUS-REF method while providing clinically effective temporal resolution (2–8 volume/sec) with negligible grating lobe artifacts. The results indicate that the proposed design approach would enable a novel TRUS imaging solution in clinics.

Funder

Department of Defense

Congressionally Directed Medical Research Programs

NIH

National Cancer Institute

NSF

National Institute of Biomedical Imaging and Bioengineering

Publisher

Oxford University Press (OUP)

Subject

Computational Mathematics,Computer Graphics and Computer-Aided Design,Human-Computer Interaction,Engineering (miscellaneous),Modeling and Simulation,Computational Mechanics

Reference45 articles.

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4. A study of synthetic-aperture imaging with virtual source elements in B-mode ultrasound imaging systems;Bae;IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control,2000

5. Ultrasonic sector imaging using plane wave synthetic focusing with a convex array transducer;Bae;The Journal of the Acoustical Society of America,2018

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