Regularization-Based 2D Strain Tensor Imaging in Quasi-Static Ultrasound Elastography < em > SAGE Publications < /em >
In this study, 2D strain tensor imaging was investigated, focusing on the use of a regularization method to improve strain images. This method enforces the tissue property of (quasi-) incompressibility, while penalizing strong field variations, to smooth the displacement fields and reduce the noise in the strain components. The performance of the method was assessed with numerical simulations, phantoms, and in vivo breast tissues. For all the media examined, the results showed a significant improvement in both lateral displacement and strain, while axial fields were only slightly modified by the regularization. The introdu...
Source: Ultrasonic Imaging - May 26, 2023 Category: Radiology Authors: Anne-Lise Duroy Val érie Detti Agn ès Coulon Olivier Basset Elisabeth Brusseau Source Type: research
Combined ARFI and Shear Wave Imaging of Prostate Cancer: Optimizing Beam Sequences and Parameter Reconstruction Approaches
This study demonstrates the implementation of a shear wave reconstruction algorithm that enables concurrent acoustic radiation force impulse (ARFI) imaging and shear wave elasticity imaging (SWEI) of prostate cancer and zonal anatomy. The combined ARFI/SWEI sequence uses closely spaced push beams across the lateral field of view and simultaneously tracks both on-axis (within the region of excitation) and off-axis (laterally offset from the excitation) after each push beam. Using a large number of push beams across the lateral field of view enables the collection of higher signal-to-noise ratio (SNR) shear wave data to reco...
Source: Ultrasonic Imaging - May 2, 2023 Category: Radiology Authors: Derek Y Chan Daniel Cody Morris Thomas J Polascik Mark L Palmeri Kathryn R Nightingale Source Type: research
