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Sparse arrays address the complexity of manufacturing large 2-D arrays. However, they usually suffer from a low signal-to-noise ratio (SNR) due to their small element size. The large divergent element (LDE) technology overcomes this limitation by simultaneously having a large emitting area and a large angular aperture. The aim of this work is to demonstrate the feasibility of imaging in B-mode […]

Use of ultrasound for coronary imaging in commercial echocardiography remains challenging because of the small nature of coronary vasculature and the myocardium’s intricate motion. Several super-resolution imaging techniques have been applied for coronary imaging; however, most of them only measure the coronary flow during the diastolic phase and have a long data acquisition time. To address […]

Recent innovations in vector flow imaging promise to bring the modality closer to clinical application and allow for more comprehensive, high frame-rate vascular assessments. One such innovation is plane-wave multi-angle vector Doppler, where pulsed Doppler principles from multiple steering angles are used to realize vector flow imaging at frame rates upward of 1000 frames per second (fps). […]

The reflection ultrasound computed tomography (UCT) is gaining prominence as an essential instrument for breast cancer screening. However, reflection UCT quality is often compromised by the variability in sound speed across breast tissue. Traditionally, reflection UCT utilizes the delay-and-sum (DAS) algorithm, where the time of flight (TOF) significantly affects the coherence of the reflected […]

Surface-acoustic-wave (SAW)-driven acoustic tweezers (ATs) have been widely explored for high-resolution ultrasonic sample manipulation. Among these, hybrid ATs comprising a reusable SAW chip and a disposable glass or silicon microfluidic (MF) chip as a superstrate offer advantages such as reduced experimental costs and minimized cross-contamination between experiments. However, maximizing the […]

This study investigates the integrity of lithium-ion batteries (LIBs) with the aid of guided ultrasonic waves (GUWs) generated by an active sensing network. Despite the expanding demands for secondary batteries in industrial fields, safety concerns remain with respect to LIBs in conventional battery management systems (BMSs). In order to avoid such safety concerns, including unpredictable […]

Three-dimensional modality is critical for ultrasonic imaging to provide a representative volumetric view of objects, for better evaluation of the shape, size, and orientation of internal features. Conventional ultrasonic transducers are still used for the majority of phased-array ultrasonic measurements. However, transducer arrays have certain drawbacks and limitations: they use a contact […]

Ultrasound molecular imaging (UMI) uses targeted microbubbles (MBs) to detect disease-associated biomarkers. For UMI, distinguishing the acoustic signals produced by bound MBs from those by free MBs and tissue is critical. Currently, the main approach, known as differential targeted enhancement (DTE), is time-intensive and requires MB destruction. Here, we introduce a novel, rapid, and […]

Emerging handheld and wearable ultrasound devices enable diagnosis and long-term monitoring outside clinical settings. They require a low-power, highly complex, locally integrated system to process the RF data. The analog-to-digital converter (ADC) is a critical building block in the receive chain of these systems as it enables digital beamforming and image reconstruction. However, the ADCs […]