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Row-column (RC) arrays typically suffer from a limited field of view (FOV), with the imaging area confined to a rectangular region equal to the footprint of the probe. This limitation can be solved by using a diverging lens in front of the probe. Previous studies have introduced a thin lens model for beamforming lensed RC arrays, but this model inaccurately assumes the lens to be infinitely thin, […]

Amyotrophic lateral sclerosis (ALS) is a progressively worsening neurodegenerative condition with very few treatment options available. Ultrasound neuromodulation offers promising benefits for treating neurodegenerative diseases such as Parkinson’s and Alzheimer’s diseases. However, the effects and underlying mechanisms of ultrasound neuromodulation on ALS remain unclear. A head-mounted […]

Accurate fluid-level assessment in sealed pipelines is crucial in wastewater treatment and petrochemical plants, among others. The traditional pulse-echo time-of-flight measurements using ultrasound sensors to measure the fluid level are challenging for low fill levels due to signal contamination with multiple echoes and the resonances in the pipe wall. Though signal-processing strategies such as […]

This article reports a surface acoustic wave (SAW) resonator at 52 GHz with a high quality factor (Q) of 188 and a high phase velocity of 12.2 km/s, marking the first millimeter-wave (mmWave) SAW devices with high Q. Transferred 300-nm 128Y lithium niobate (LN) thin film on 4H silicon carbide (SiC) substrate is used for the acoustic platform. The dramatic frequency scaling is enabled by the high […]

Passive acoustic mapping (PAM) is a promising tool to monitor acoustic cavitation activities for focused ultrasound (FUS) therapies. While 2-D matrix arrays allow 3-D PAM, the high channel count requirement and the complexity of the receiving electronics limit their practical value in real-time imaging applications. In this regard, row-column-addressed (RCA) arrays have shown great potential in […]

Capacitive micromachined ultrasonic transducers (CMUTs) offer several advantages over standard lead zirconate titanate (PZT) transducers, particularly for implantable devices. To eliminate their typical need for an external bias voltage, we embedded a charge storage layer in the dielectric. The objective of this study was to evaluate the performance of plasma-enhanced chemical vapor deposition […]

Intravascular ultrasound (IVUS) provides detailed imaging of the artery circumference. Over the past years, the interest in artificial intelligence (AI) for interpretation and automatic analysis of IVUS images has grown. Development of such algorithms typically requires considerable amounts of annotated data. However, manual annotation of IVUS data is time-consuming and expensive. An alternative […]

Multiphysics modeling is crucial in surface acoustic wave (SAW) resonators. Existing coupling methods primarily focus on the displacement and electrical potential originating from the piezoelectric effect. As SAW technology advances, novel interaction mechanisms introduce new challenges in multiphysics modeling. In order to address these complexities, simulations must incorporate additional […]

In the field of quantitative ultrasound (QUS), several studies have been conducted to parameterize tissue anisotropy by measuring the angular dependence of the backscatter coefficient (BSC). Early foundational studies utilized a single-element transducer, and more recent ones used ultrasound linear array probes. However, probe features such as directivity and crosstalk can strongly affect both, […]