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Accurate and generalizable object segmentation in ultrasound imaging remains a significant challenge due to anatomical variability, diverse imaging protocols, and limited annotated data. In this study, we propose a prompt-driven vision–language model (VLM) that integrates grounding DINO with SAM2 to enable object segmentation across multiple ultrasound organs. A total of 18 public ultrasound […]

Super-resolution ultrasound (SRUS) technology based on contrast agents has shown great potential in in vivo microvascular blood flow imaging and has become a hot topic in the industry in recent years. SRUS represented by ultrasound localization microscopy (ULM) eliminates the point spread function (PSF) caused by diffraction by localizing sparse microbubbles in the image, and then constructs a […]

Ultrasound propagation attenuation coefficient detection is a widely used technique for distinguishing different media types. Multifrequency ultrasound detection provides comprehensive information but requires ultrasonic transducers with a broad bandwidth. This study presents a piezoelectric micromachined ultrasonic transducer (PMUT) array that integrates multiple frequency elements with […]

Bessel beams are exact solutions to the isotropic/homogeneous wave equation. In theory, they can propagate to infinite distances without diffraction. In practice, when produced with a finite aperture, they have a very large depth of field, i.e., they can maintain a small beamwidth over a large distance. In addition, they have a self-healing ability after encountering an obstacle. Because of these […]

Deep learning enables automatic and robust extraction of cardiac function descriptors from echocardiographic sequences, such as ejection fraction (EF) or strain. These descriptors provide fine-grained information that physicians consider, in conjunction with more global variables from the clinical record, to assess patients’ condition. Drawing on novel Transformer models applied to tabular […]

This work compares the effectiveness of four image reconstruction techniques for a ring-array photoacoustic computed tomography (PACT) system: the delay-and-sum (DAS), the interpolated model matrix inversion (IMMI), the frequency-domain model-based (FDMB), and the time-reversal (TR) methods. Image quality, computational efficiency, and robustness to noise and spatial/electrical impulse response […]

The endorectal ultrasound (US)-guided thermal ablation of prostate cancer (PCa) using high-intensity focused ultrasound (HIFU) is a widely used focal intervention. While generally safe and effective, it is not without challenges associated with heat diffusion and prefocal heating, which has spurred interest toward nonthermal and mechanical HIFU ablation regimes. Another challenge is the necessity […]

Pancreatic ductal adenocarcinoma (PDAC) has a poor prognosis and limited treatment options. Focused ultrasound (FUS) has shown potential for improving PDAC treatment outcomes by enhancing drug delivery through acoustic cavitation. In this article, we present the development of a prototype endoscopic ultrasound (EUS) device capable of producing microbubble-mediated cavitation with ultrasound […]

While passive acoustic mapping (PAM) has been advanced for monitoring acoustic cavitation activity in focused ultrasound (FUS) therapy, achieving both real-time and high-quality imaging capabilities is still challenging. The angular spectrum (AS) method presents the most efficient algorithm for PAM, but it suffers from artifacts and low resolution due to the diffraction pattern of the imaging […]