scholarly journals Standardization of blood flow measurements by automated vascular analysis from power Doppler ultrasound scan

2020 ◽  
Author(s):  
Yi Yin ◽  
Pádraig Looney ◽  
Sally L. Collins
Keyword(s):  
Blood Flow ◽  
Doppler Ultrasound ◽  
Power Doppler ◽  
Ultrasound Scan ◽  
Power Doppler Ultrasound ◽  
Flow Measurements ◽  
Blood Flow Measurements

scholarly journals The Methodology of Doppler-Derived Central Blood Flow Measurements in Newborn Infants

2012 ◽  
Vol 2012 ◽  
pp. 1-13 ◽  
Author(s):  
Koert A. de Waal
Keyword(s):  
Blood Flow ◽  
Doppler Ultrasound ◽  
Superior Vena ◽  
Ductus Arteriosus ◽  
Newborn Infants ◽  
Vena Cava ◽  
Left Ventricular ◽  
Flow Measurements ◽  
General Guide ◽  
Blood Flow Measurements

Central blood flow (CBF) measurements are measurements in and around the heart. It incorporates cardiac output, but also measurements of cardiac input and assessment of intra- and extracardiac shunts. CBF can be measured in the central circulation as right or left ventricular output (RVO or LVO) and/or as cardiac input measured at the superior vena cava (SVC flow). Assessment of shunts incorporates evaluation of the ductus arteriosus and the foramen ovale. This paper describes the methodology of CBF measurements in newborn infants. It provides a brief overview of the evolution of Doppler ultrasound blood flow measurements, basic principles of Doppler ultrasound, and an overview of all used methodology in the literature. A general guide for interpretation and normal values with suggested cutoffs of CBFs are provided for clinical use.

scholarly journals Three-dimensional Power Doppler Ultrasound Study of the Placenta

2014 ◽  
Vol 8 (4) ◽  
pp. 400-409
Author(s):  
Toshiyuki Hata ◽  
Sarah Cajusay-Velasco
Keyword(s):  
Blood Flow ◽  
Doppler Ultrasound ◽  
Color Doppler ◽  
Power Doppler ◽  
Three Dimensional ◽  
Morphological Characteristics ◽  
Power Doppler Ultrasound ◽  
Placental Perfusion ◽  
Ultrasound Study ◽  
3D Power Doppler

ABSTRACT Advanced ultrasound technology has been a valuable tool in the assessment of placental anatomy and physiology. Conventional two-dimensional (2D) sonography reveals placental morphological characteristics, 2D color Doppler can assess blood flow in the placenta, 2D power Doppler can evaluate placental vascular trees, and three-dimensional (3D) ultrasound gives more detailed information on the surface anatomy. Recent advances, such as 3D power Doppler with virtual organ computer aided-analysis (VOCAL) and histogram analysis can measure the placental volume, and assess uteroplacental and fetoplacental perfusions. In particular, ‘placental vascular sonobiopsy’ can specifically evaluate the second- and thirdtrimester placental blood flow and vascularity by obtaining several spherical samples from the placenta that will represent the entire placenta. This article presents normal placental development and pathological findings of the placenta using 3D power Doppler ultrasound, and discusses 3D power Doppler assessments of placental perfusion in high-risk pregnancies, such as fetal growth restriction, pregnancy-induced hypertension and preeclampsia, and, from this basis, re-establishes the importance of 3D power Doppler ultrasound as a screening, diagnostic, and surveillance tool in normal and abnormal pregnancies. How to cite this article Tanaka H, Cajusay-Velasco S, Noguchi J, Hata T. Three-dimensional Power Doppler Ultrasound Study of the Placenta. Donald School J Ultrasound Obstet Gynecol 2014;8(4):400-409.

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