Keita Yokoyama

College of Engineering

2022 article

Quantitative Estimation of Shear Elastic Heterogeneity and Anisotropy in Excised Canine Kidneys using Double Profile Intersection (DoPIo) Ultrasound

2022 IEEE INTERNATIONAL ULTRASONICS SYMPOSIUM (IEEE IUS).

By: K. Yokoyama n, T. Nichols* & C. Gallippi n

author keywords: ARFI; Elastography; DoPIo; Beamforming; Heterogeneity; Anisotropy; Kidney
UN Sustainable Development Goal Categories
Source: Web Of Science
Added: February 6, 2023

2022 article

in vivo VisR Measurements of Viscoelasticity and Viscoelastic Anisotropy in Human Allografted Kidneys Differentiate Interstitial Fibrosis and Graft Rejection

2022 IEEE INTERNATIONAL ULTRASONICS SYMPOSIUM (IEEE IUS).

By: K. Yokoyama n, M. Hossain n, M. Caughey n, M. Fisher*, R. Detweiler*, E. Chang*, C. Gallippi n

author keywords: ARFI; Elastography; VisR; Beamforming; Anisotropy; Viscoelasticity; Fibrosis; Inflammation
TL;DR: Viscoelastic Response imaging is relevant to early detection of transplant kidney fibrosis and rejection, which could enable timely interventions that extend graft life, and noninvasive VisR RE-based RR had similar performance but also differentiated rejected from fibrotic kidney. (via Semantic Scholar)
UN Sustainable Development Goal Categories
10. Reduced Inequalities (OpenAlex)
Source: Web Of Science
Added: February 6, 2023

2021 article

Assessing the Impact of ARF Excitation Beam Width and Tracking Beam Concurrency on DoPIo Imaging Performance in a Calibrated Phantom

INTERNATIONAL ULTRASONICS SYMPOSIUM (IEEE IUS 2021).

By: K. Yokoyama n, K. Anand n & C. Gallippi n

author keywords: ARFI; Elastography; DoPIo; Speckle Tracking; PSF; Beamforming; Displacement Underestimation
TL;DR: In silico experiments suggested that DoPIo acquisitions performed using a wide ARF push beam and simultaneous tracking provided the most accurate and precise elasticity estimates, while all four combinations of parameters enabled the differentiation of a soft inclusion within a stiff background in vitro. (via Semantic Scholar)
UN Sustainable Development Goal Categories
Source: Web Of Science
Added: August 15, 2022

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