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Histotripsy is a noninvasive focused ultrasound therapy that liquifies tissue via bubble activity. Conventional ultrasound imaging is used in current clinical practice to monitor histotripsy. Developing surrogate imaging metrics for successful treatment outcomes remains an unmet clinical need. The goal of this work was twofold. First, we investigated whether histotripsy bubble clouds detected […]

This article deliberately explores the frequency trimming and performance enhancement of piezoelectric MEMS resonators through localized annealing induced by Joule heating. Targeting the effective postfabrication treatment of thin-film piezoelectric-on-silicon (TPoS) resonators, we employ a novel annealing approach that modifies the silicon resonator body-bottom electrode interface to enable […]

Class imbalance is a significant challenge in medical image analysis, particularly in lung ultrasound (LUS), where severe patterns are often underrepresented. Traditional oversampling techniques, which simply duplicate original data, have limited effectiveness in addressing this issue. To overcome these limitations, this study introduces a novel supervised autoencoder generative adversarial […]

Ultrasound computed tomography (USCT) is a promising technique for breast cancer detection because of its quantitative imaging capability of the speed of sound (SOS) of soft tissues and the fact that malignant breast lesions often have a higher SOS compared to healthy tissues in the human breast. Compared to waveform inversion-based USCT, bent-ray tracing USCT is relatively less computationally […]

Ultrasound (US) is considered a key modality for the clinical assessment of hepatic steatosis (i.e., fatty liver) due to its noninvasiveness and availability. Deep learning methods have attracted considerable interest in this field, as they are capable of learning patterns in a collection of images and achieve clinically comparable levels of accuracy in steatosis grading. However, variations in […]

This article reports the first groups of low-loss acoustic solidly mounted resonators (SMRs) and acoustic delay lines (ADLs) at 14–20 GHz. Bulk acoustic waves (BAWs) are confined in thin-film scandium aluminum nitride (ScAlN) on top of dielectric acoustic Bragg reflectors, consisting of alternating silicon dioxide with tantalum pentoxide (Ta2O5/SiO ${}_{{2}}\text {)}$ or niobium pentoxide […]

In this article, a correlation-based (CB) ultrasound imaging technique is implemented to extend the field of view (FOV) in the inspected medium and to enhance image homogeneity. This implementation involves the acquisition, the compression, and the adaptation of a database of experimental reference signals (CB-Exp), consisting of backpropagated reflections on point-like scatterers at different […]

Different orders of Lamb wave mode resonators using interdigital transducers (IDTs) and LiNbO3 thin films are increasingly important due to their large electromechanical coupling ( ${k}_{\text {t}}^{{2}}$ ) and high phase velocities, essential for millimeter wave (mmWave) miniaturized acoustic filters. In $50~\Omega $ systems, achieving proper impedance matching necessitates large static […]

Ultrasound localization microscopy (ULM) represents a significant advancement over traditional ultrasound (US) imaging, enabling super-resolution (SR) imaging of microvascular structures with unprecedented detail, by using microbubbles (MBs) as highly reflective contrast agents. After injection into the bloodstream, MBs are localized in US images to reconstruct the microvasculature. However, this […]