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10 April 2023 3D full-waveform inversion in ultrasound computed tomography employing a ring-array
Fu Li, Umberto Villa, Nebojsa Duric, Mark A. Anastasio
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Proceedings Volume 12470, Medical Imaging 2023: Ultrasonic Imaging and Tomography; 124700K (2023) https://doi.org/10.1117/12.2654406
Event: SPIE Medical Imaging, 2023, San Diego, California, United States
Abstract
Ultrasound computed tomography (USCT) is an emerging medical imaging modality that holds great promise for breast cancer diagnosis. Full-waveform inversion (FWI)-based image reconstruction methods for USCT can produce high spatial resolution and accurate images of the acoustic properties of soft tissues. A common USCT design employs a circular ring-array comprised of elevation-focused ultrasonic transducers. Volumetric imaging can be achieved by translating the ring-array orthogonally to the imaging plane. Slice-by-slice two-dimensional (2D) reconstruction methods have been implemented to form a composite three-dimensional (3D) volumes by stacking together reconstructed cross-sectional images at each ring-array position. However, this 2D approach does not account for the 3D wave propagation physics and the focusing properties of the transducers, and can result in out-of-plane scattering-based artifacts and inaccuracies. To overcome this, a new 3D time-domain FWI method is proposed for ring-array-based USCT that concurrently utilizes measurement data acquired from multiple positions of the ring-array. A virtual imaging study of ring-array-based USCT that employs a realistic 3D numerical breast phantom was conducted to assess the impact of the number of ring-array measurements on image quality.
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Fu Li, Umberto Villa, Nebojsa Duric, and Mark A. Anastasio "3D full-waveform inversion in ultrasound computed tomography employing a ring-array", Proc. SPIE 12470, Medical Imaging 2023: Ultrasonic Imaging and Tomography, 124700K (10 April 2023); https://doi.org/10.1117/12.2654406
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KEYWORDS
3D image reconstruction
Data acquisition
Breast imaging
Ultrasound tomography
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