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Carotid atherosclerotic plaques are a major complication associated with type II diabetes, and carotid ultrasound is commonly used for diagnosing carotid vascular disease. In primary hospitals, less experienced ultrasound physicians often struggle to consistently capture standard carotid images and identify plaques. To address this issue, we propose a novel approach, the long-short memory-based […]

Intravascular ultrasound (IVUS) is the gold standard modality for in vivo visualization of coronary arteries and atherosclerotic plaques. Classification of coronary plaques helps to characterize heterogeneous components and evaluate the risk of plaque rupture. Manual classification is time-consuming and labor-intensive. Several machine learning-based classification approaches have been proposed […]

Nanodroplets (NDs) are phase-changing agents that have shown great potential for ultrasound (US) applications. When US is applied, NDs can undergo a phase transition into gas bubbles, enabling cavitation that can be used to reduce the pressure threshold required for mechanical ablation of tissues. Effective tissue fractionation depends on precise vaporization to achieve uniform and predictable […]

Ultrasound (US) has the unique potential to offer access to medical imaging to anyone, everywhere. Devices have become ultraportable and cost-effective, akin to the stethoscope. Nevertheless, and despite many advances, US image quality and diagnostic efficacy are still highly operator- and patient-dependent. In difficult-to-image patients, image quality is often insufficient for reliable […]

This article reports a $30\times 12$ row-column (RC) addressed flexible piezoelectric micromachined ultrasound transducer (PMUT) array with a top-down fabrication process. The fabrication uses a temporary carrier wafer from which the array device is released by deep reactive ion etching (DRIE). About 0.8- $\mu $ m-thick sol-gel processed lead zirconate titanate (PZT) thin film acts as the […]

Three-dimensional ultrasound (3-D US) imaging with freehand scanning is utilized in cardiac, obstetric, abdominal, and vascular examinations. While 3-D US using either a “wobbler” or “matrix” transducer suffers from a small field of view and low acquisition rates, freehand scanning offers significant advantages due to its ease of use. However, current 3-D US volumetric reconstruction […]

Large vessel occlusion (LVO) stroke, in which major cerebral arteries such as the internal carotid and middle cerebral arteries supplying the brain are occluded, is the most debilitating form of acute ischemic stroke (AIS). The current gold standard treatment for LVO stroke is mechanical thrombectomy; however, initial attempts to recanalize these large, proximal arteries supplying the brain fail […]

Ultrasound computed tomography (USCT) quantifies acoustic tissue properties such as the speed-of-sound (SOS). Although full-waveform inversion (FWI) is an effective method for accurate SOS reconstruction, it can be computationally challenging for large-scale problems. Deep learning-based image-to-image learned reconstruction (IILR) methods can offer computationally efficient alternatives. This […]

Current interstitial techniques of tumor ablation face challenges that ultrasound (US) technologies could meet. The ablation radius and directionality of the US beam could improve the efficiency and precision. Here, a nine-gauge magnetic resonance (MR)-compatible dual-mode US catheter prototype was experimentally evaluated for ultrasound image-guided high-intensity focused ultrasound (USgHIFU) […]