Influence of Doppler ultrasound on fetal activity.

Multidimensional Ultrasound Doppler Signal Analysis for Fetal Activity Monitoring.

Fetal activity parameters such as movements, heart rate and the related parameters are essential indicators of fetal wellbeing, and no device provides simultaneous access to and sufficient estimation of all of these parameters to evaluate fetal health. This work was aimed at collecting these parameters to automatically separate healthy from compromised fetuses. To achieve this goal, we first de...

Ultrasound Frontiers: 3D Doppler, Automatic Fetal Biometry, Handheld Ultrasound

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...

Doppler ultrasound assessment of fetal anaemia in an alloimmunised pregnancy

Introduction While the use of elevated middle cerebral artery peak systolic velocity (MCA PSV) in assessing fetal anaemia is well known, its occurrence is uncommon due to the current practice of giving prophylactic doses of ultrafiltered Rh (D) immunoglobulin (anti-D) in Rh (D) negative women. In mothers who do not receive prophylaxis with Rh immunoglobulin, the overall risk of immunisation for...

Doppler ultrasound studies of human fetal blood flow.

The Influence of Window Size of Autocorrelation Function on Fetal Heart Rate Variability Measurement Using the Doppler Ultrasound Signal

Commonly used noninvasive fetal monitoring is based on fetal heart rate (FHR) variability analysis of the Doppler ultrasound signal coming from the mechanical activity of the fetal heart. Estimation of periodicity of acquired signals using the autocorrelation technique is very important. The determination of cardiac intervals using the Doppler signal is more difficult than in electrocardiograph...