OBJECTIVE The goal of this paper is to assess the validity of various metrics developed to characterize tongue shapes and positions collected through ultrasound imaging in experimental setups where the probe is not constrained relative to the subject's head. PATIENTS AND METHODS Midsagittal contours were generated using an articulatory-acoustic model of the vocal tract. Sections of the tongue...

On the process of render brain tumors from endoneurosonography, one of the most important steps consists in track the axis line of an ultrasound probe throughout successive endoscopic images. Recognizing of this line is important because it allows computing its 3D coordinates using the projection matrix of the endoscopic cameras. In this paper we present a method to track an ultrasound probe in...

The goal of this project is to develop visual servoing for intraoperative robotic ultrasound. The doctor would select a predefined volume from a reference image such as CT or MRI which was obtained before the procedure. Subsequently the robot would image the patient with an ultrasound probe at the predefined volume of interest. This technique would allow the doctor to obtain accurate anatomy of...

A basic understanding of physics and orientation is essential for understanding ultrasound. However, when standing in front of the ultrasound machine, you need to make some concrete decisions about what probe to use, and what buttons to press, in order to obtain a good image—sometimes known as knobology. This chapter covers the basics of probes and probe selection as well as the buttons found o...

We introduce an imaging technique that combines complementary features of ultrasound and near-infrared diffusive light imaging. We achieve the combined technology experimentally by mounting an ultrasound array together with multiple laser source and optical detector fibers upon a hand-held probe. The technique is demonstrated with tissue phantoms wherein both acoustic and optical sensors image ...

BACKGROUND High-intensity focused ultrasound has been applied to internal organs from outside the body to ablate tissue. No published study has assessed the feasibility of ablating cardiac tissue within the beating heart by use of this type of therapeutic ultrasound. The purpose of this study was to determine whether high-intensity focused ultrasound can be used to ablate the atrioventricular (...

Introduction: One of the combination therapies for the treatment of cancer is ultrasound with other agents, which has received considerable attention in recent years. Ultrasound causes cavitation phenomenon that can produce some effects, such as; Reactive Oxygen Species (ROS), which results in damage to cancer cells. When a particle is in liquid, the cavitation threshold decrea...

To the Editor, Recently, opportunities for ultrasound-guided peripheral nerve block have been increasing. It is difficult for beginners, and sometimes even for skilled persons, to visualize the needle during the procedure due to the narrow width of the ultrasonic beam. There have been several reports of attempting easy visualization of the needle, for example, with the use of a needle guide [1–...