Abstract Ultrasound echo envelope statistics have been widely studied for quantitative tissue characterization. In ultrasound measurements, the size of region-of-interest (ROI) is limited by several factors, such as locality characteristics and depth dependence acoustic field beam. this case, evaluated vary even when amplitudes follow same population without any noise. study, statistical varian...

OBJECTIVE To make a comparative evaluation of estimation of fetal weight in term pregnancy by u sin g a) abdominal girth (AG) X symphysiof.indal height (SFH) b) Hadlock's formula using ultrasonography c) Johnson's formula and d) Dawn's formula. METHODS The fetal weight in-utero was calculated by usin g the above methods in 200 pregnant women at term. The results were correlated with the actual ...

OBJECTIVES To test the hypothesis that third trimester placental biometry and volume can be measured by two-dimensional (2D) and three-dimensional (3D) ultrasound in utero, determining which method of measurement was most strongly correlated with true placental size ex vivo. METHODS Singleton pregnancies underwent placental ultrasound within seven days of delivery (n = 87, 29(+3)-41(+5) weeks...

To examine the role of three-dimensional (3D) volume estimation in predicting pituitary down-regulation in an IVF-embryo transfer programme, 46 women were treated with buserelin acetate for down-regulation prior to and concomitantly with ovarian stimulation. Receiver operating characteristic (ROC) curve analysis was used for statistics. The area under the curve (AUC) provides a measure to show ...

AIMS automatic detection of the QRS complex on electrocardiogram (ECG) is used on cardiac ultrasound scanners to separate ultrasound image series into cardiac cycles for playback and storage. On small hand-held scanners it is unpractical to connect ECG cables. We therefore aim to do automatic cardiac cycle separation using apical B-mode ultrasound images. METHODS AND RESULTS cardiac cycle len...

AIM The aim of this study is to compare the ultrasound estimation of the cross-sectional area (CSA) and diameter of internal jugular vein (IJV) with left ventricular end diastolic area (LVEDA) for the assessment of intravascular volume in pediatric patients during cardiac surgery. PATIENTS AND METHODS The CSA and diameter of the left IJV were defined, using ultrasound machine, and compared wi...

Purpose: A novel image-based method for speed of sound (SoS) estimation is proposed and experimentally validated on a tissue-mimicking ultrasound phantom normal human liver in vivo using linear curved array transducers. Methods: When the beamforming SoS settings are adjusted to match real tissue’s SoS, image at regions interest will be focus quality optimal. Based this principle, both were used...