Determining the relationship between three-dimensional power Doppler data and true blood flow characteristics: anin-vitroflow phantom experiment

2008 ◽  
Vol 32 (4) ◽  
pp. 540-550 ◽  
Author(s):  
N. J. Raine-Fenning ◽  
N. M. Nordin ◽  
K. V. Ramnarine ◽  
B. K. Campbell ◽  
J. S. Clewes ◽  
...  
Keyword(s):  
Blood Flow ◽  
Power Doppler ◽  
Three Dimensional ◽  
Flow Characteristics ◽  
Phantom Experiment ◽  
Doppler Data ◽  
True Blood ◽  
The Relationship

scholarly journals Evaluation of the effect of machine settings on quantitative three-dimensional power Doppler angiography: anin-vitroflow phantom experiment

2008 ◽  
Vol 32 (4) ◽  
pp. 551-559 ◽  
Author(s):  
N. J. Raine-Fenning ◽  
N. M. Nordin ◽  
K. V. Ramnarine ◽  
B. K. Campbell ◽  
J. S. Clewes ◽  
...  
Keyword(s):  
Power Doppler ◽  
Three Dimensional ◽  
Phantom Experiment

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.

Intraplacental blood flow in third trimester of placental insufficiency pregnancy

2014 ◽  
Vol 63 (5) ◽  
pp. 51-57
Author(s):  
Anna N Zakurina ◽  
Natalia G Pavlova
Keyword(s):  
Blood Flow ◽  
Pregnant Women ◽  
Blood Circulation ◽  
Power Doppler ◽  
Three Dimensional ◽  
Functional System ◽  
Placental Insufficiency ◽  
Delivery Time ◽  
Third Trimester ◽  
Additional Criterion

Background. Serious perinatal, most of all, neurological consequences of placental insufficiency condition necessity further search it’s markers for optimal delivery time. Methods. At third term of pregnancy we examined 16 singleton physiological pregnant women (first group) and 27 placental insufficiency patients (second group). We standard obstetrical examined, ultrasound fetometry, basic arteries of functional system mother-placenta-fetus Doppler and three-dimensional power Doppler in central, two paracentral and two periphery placenta areas. We processing images by VOCAL and analyzed vascularisation (VI), flow (FI) and vascularisation-flow indexes (VFI). Results. In placentae correlated groups FI differ in size reliable in central (t=4,03; p<0,001 и U=240,00; p<0,001) and paracentral (t=2,61; p<0,05 и U=348,00; p<0,05) areas. Patients second group indexes were relative on 17% and 8% less than patients first group indexes. Patients second group VFI was on 35% less than patients first group VFI (t=2,08; p<0,05 и U=337,00; p<0,05). We described results of comparison three-dimensional power Doppler intraplacental blood flow indexes from patients second group with different degree hemodynamic disorder. Conclusion. In placental insufficiency presence reduction blood circulation, particular in central placenta area, conditioned by reduction blood flow in initial vessels number. Central placenta area FI may be regarded new additional criterion of placental insufficiency at third term of pregnancy.

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