Due to the small aperture of blood vessel, a considerable disadvantage to current intravascular ultrasound (IVUS) imaging transducers is that their lateral imaging resolution is much lower than their axial resolution. To solve this problem, a single-element, 50 MHz, 0.6 mm diameter IVUS transducer with a geometric focus at 3 mm was proposed in this paper. The focusing transducer was based on a ...

This was a case control study designed to evaluate carotid intima-medial thickness (IMT) by high-resolution ultrasound in hypertensive and normotensive individuals. High-resolution carotid ultrasound was done in 203 hypertensive patients (cases) and 101 normotensive individuals (control). Scanning of bilateral common carotid artery (CCA) was performed in anteroposterior projections. To obtain a...

Key points † Percutaneous nerve stimulation is a recently introduced technique to facilitate peripheral nerve block. † We evaluated the ability of this technique to localize nerves of the brachial plexus as verified by ultrasound imaging in 20 volunteers. † There was only a 10% concordance between the most superficial nerves identified by percutaneous stimulation and ultrasound imaging. Backgro...

Neuromuscular ultrasound involves the use of high-resolution ultrasound to image the peripheral nervous system of patients with suspected neuromuscular diseases. It complements electrodiagnostic studies well by providing anatomic information regarding nerves, muscles, vessels, tendons, ligaments, bones, and other structures that cannot be obtained with nerve conduction studies and electromyogra...

Technical advances in high-resolution ultrasound have brought ultrasound to the forefront of thyroid imaging. Despite the seeming similarity in the imaging appearance of diffuse thyroid diseases, the radiologist should be able to identify patients with diffuse thyroid abnormality, be aware of the spectrum of the imaging appearance of common thyroid conditions, suggest a clinically relevant diff...

Introduction Ultrasound is widely applied in the clinical field today, such as ultrasound contrast agent imaging, High Intensity Focused Ultrasound (HIFU), Extracorporeal Lithotripsy, sonodynamic therapy. Some of these have a close relation to the dynamic behavior of micro bubbles and that of a bubble cloud. In an ultrasound imaging, micro bubbles are used as contrast agents. Extracorporeal Foc...

INTRODUCTION Ultrasound-guided interventions often necessitate scanning of deep-seated anatomical structures that may be hard to visualize. Visualization can be improved using reconstructed 3D ultrasound volumes. High-resolution 3D reconstruction of a large area during clinical interventions is challenging if the region of interest is unknown. We propose a two-stage scanning method allowing the...

BACKGROUND AND OBJECTIVES Non-invasive evaluation of endothelial function with high resolution ultrasound has become a widely accepted tool in determination of high risk subjects for early atherosclerosis. Despite its simple appearance, ultrasonographic assessment of brachial artery changes, is technically challenging and has a significant learning curve. In the present study, we evaluate the i...

Laser-enhanced cavitation during high intensity focused ultrasound (HIFU) was studied in vivo using a small animal model. Laser light was employed to illuminate the sample concurrently with HIFU radiation. The resulting cavitation was detected with a passive cavitation detector. The in vivo measurements were made under different combinations of HIFU treatment depths, laser wavelengths, and HIFU...

We are developing techniques for guiding ultrasound probes and other clinical tools with respect to the exterior of the patient, using one or more video camera(s) mounted directly on the probe or tool. This paper reports on a new method of matching the real-time video image of the patient’s exterior against a prior high-resolution surface map acquired with a multiple-camera imaging device used ...