OBJECTIVES The aims of this study were, first, to establish the agreement between digital and ultrasound assessment of occipital position and, second, to evaluate the repeatability of the measurements of head direction, angle of the middle line, progression distance and angle of progression in women in the second stage of labor. METHODS Digital examination and then transabdominal ultrasound e...

Real-time 3D ultrasound (US) has become a promising new tool for guiding surgical procedures [1]. In particular, minimally invasive applications within a beating heart are now possible because of US's high tissue/blood contrast and a temporal resolution capable of capturing fast-moving cardiac structures [2]. Intra-cardiac beating heart procedures present new challenges such as limited workspac...

The purpose of this paper is to present a software package for the handling and management of prostate transabdominal ultrasound images. The software package can be used to detect men's prostate in transabdominal ultrasound images, to build a 3D model for the detected object, to represent the 3D model obtained, to calculate prostate's volume and to classify the prostate transabdominal ultrasoun...

We model the process of imaging soft tissues with a 3D ultrasound probe using a linear convolution model, and obtain analytical expressions of both the ultrasound image and its spectrum. We use this model to study the ultrasound decorrelation caused by tissue motion both in the spatial domain and spectral domain. Finally, we propose a spectral-feature-based algorithm to analyze tissue motion. T...

Three-dimensional ultrasound (3D US) is a new imaging modality, which is being introduced into clinical practice. Although this technique will not probably replace two-dimensional ultrasound, it is being increasingly used. It has been reported that 3D US is a very high reproducible technique. The endometrium has been paid special attention when using this technique. The aim of this paper is to ...

Ultrasound frontiers are infinitive and some recent developments are discussed in this review. The author aims to provide the reader with the definition of 3D Doppler and its potential clinical applications. It also describes automatic fetal biometry and discusses clinical potentials of handheld ultrasound. The rapid development of these new sonographic techniques will continue to enlarge the s...

The orientation of cardiac fibers affects the anatomical, mechanical, and electrophysiological properties of the heart. Although echocardiography is the most common imaging modality in clinical cardiac examination, it can only provide the cardiac geometry or motion information without cardiac fiber orientations. If the patient's cardiac fiber orientations can be mapped to his/her echocardiograp...

This paper describes the data setup of the second cardiac Motion Analysis Challenge (cMac2). The purpose of this challenge is to initiate a public data repository for the benchmark of motion and strain quantification algorithms on 3D ultrasound images. The data currently includes synthetic images that combine ultrasound and biomechanical simulators. We also collected sonomicrometry curves and u...

Objective: Various methods are currently available to noninvasively quantify bladder volume. The goal of this project was to determine the most accurate method of quantifying bladder volume using 2D and 3D ultrasound techniques during UD. Methods: Nine female participants with OAB underwent an extended urodynamics procedure (Laborie Aquarius XT) while ultrasound images of the bladder were obtai...

In biological tissue, an increase in elasticity is often a marker of abnormalities. Techniques such as quasi-static ultrasound elastography have been developed to assess the strain distribution in soft tissues in two dimensions using a quasi-static compression. However, as abnormalities can exhibit very heterogeneous shapes, a three dimensional approach would be necessary to accurately measure ...