BACKGROUND Model-based reconstruction algorithms have shown potentials over conventional strain-based methods in quasi-static elastographic image by using realistic finite element (FE) or bio-mechanical model constraints. However, it is still difficult to properly handle the discrepancies between the model constraint and ultrasound data, and the measurement noise. METHODS In this paper, we ex...

OBJECTIVE To quantify the financial benefits of using ultrasound estimation of gestational age in maternal serum screening for Down syndrome. METHODS Maternal age-specific sensitivity and false-positive rates for Down syndrome were derived for the triple test (alpha-fetoprotein, hCG, and unconjugated estriol) using gestational age based on ultrasound dating and also time from the last menstru...

Introduction: Determination of fetal weight is important for the management during labour and delivery. It helps in determining mode delivery aids diagnosing low birth weight, macrosomia, intrauterine growth restriction fetus. Ultrasound may not be available under-resourced settings. Therefore, it to study accuracy clinical estimation with sonographic actual weight.
 Methods: One hundred f...

Background: The Kalman filter is an effective tool for estimating a stochastic process in noise. Given a state-space model of a stochastic process, the Kalman filter recursively estimates state variables from noisy measurements by minimizing the sum of squared estimation errors. It is an optimal estimator for a Gauss random process and provides estimates of error variances. Its application for ...

background: with the technical development, ultrasound tends to overpass its limits and to become the main investigation tool even for situations when it was traditionally considered second best. it is more convenient both for patient and doctor, less expensive and has real diagnostic value. objective: the present paper, and its graphic back-up, are intended as a visual testimony of the fact th...

BACKGROUND Whether gestational age per se increases perinatal mortality in post-term pregnancy is unclear. We aimed at assessing gestational week specific perinatal mortality in small-for-gestational-age (SGA) and non-SGA term and post-term gestations, and specifically to evaluate whether the relation between post-term gestation and perinatal mortality differed before and after ultrasound was i...

Displacement estimation is an essential step for ultrasound elastography and numerous techniques have been proposed to improve its quality using two frames of ultrasound RF data. This paper introduces a technique for calculating a displacement field from three (or multiple) frames of ultrasound RF data. To calculate a displacement field using three images, we first derive constraints on variati...

Radiofrequency ablation (RFA) has been widely used as an alternative treatment modality for liver tumors. Monitoring the temperature distribution in the tissue during RFA is required to assess the thermal dosage. Ultrasound temperature imaging based on the detection of echo time shifts has received the most attention in the past decade. The coefficient k, connecting the temperature change and t...

Ultrasound imaging has shown to be well adapted for guidance of micro tools, such as biopsy needles or electrodes, in the human body. Indeed it is safe for both patient and physicians, it is cheap and flexible compared to other imaging modalities. The ultrasound imaging offers a real-time acquisition speed but it has to deal with a typical speckle noise and other acoustic artifacts in the image...

Distance estimation plays an important role in location-based services, which has become very popular in recent years. In this paper, a new short range cricket sensor-based approach is proposed for indoor location applications. This solution uses Time Difference of Arrival (TDoA) between an optical and an ultrasound signal which are transmitted simultaneously, to estimate the distance from the ...