Validation of fractional moving blood volume measurement with power Doppler ultrasound in an experimental sheep model
Open accessAbstract
OBJECTIVE: To compare fractional moving blood volume (FMBV) estimation using power Doppler ultrasound (PDU) with blood flow estimation using radioactive microspheres (RMS) for evaluation of fetal organ blood perfusion. METHODS: Blood flow was measured in the adrenal gland of nine exteriorized fetal lambs. Five fetal lambs underwent total umbilical cord occlusion in order to induce changes in the adrenal blood flow (asphyxia group). Four lambs were used as sham controls (control group). Three RMS injections, with coincident PDU recordings of the adrenal gland, were performed in each lamb. In the asphyxia group, measurements were taken before the cord occlusion, 5 min later and when the mean blood pressure decreased below 25 mmHg. In the control group, the measurements were done with an interval of 5 min. FMBV normalized for attenuation of PDU signals, and mean pixel intensity (MPI) were estimated offline. After completion of the study, adrenal blood perfusion was calculated according to the reference sample microsphere technique, using the isotope activity and expressed in mL/min/100 g. The correlation between RMS and FMBV and MPI, respectively, was analyzed individually for each lamb. RESULTS: In the asphyxia group, all lambs showed a marked reduction in the adrenal blood perfusion towards the third RMS injection. In the control group, the adrenal perfusion showed small variations throughout the experiment. In the total material, there was a higher correlation between FMBV and RMS (median, r = 0.90; range, 0.43-0.99) than between MPI and RMS (median, r = 0.55; range, -0.53 to 0.99). CONCLUSION: The FMBV method of quantifying PDU signals correlates highly with blood flow perfusion estimation using RMS in the fetal lamb adrenal gland.
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Power Doppler is virtually angle independent, which allows better detection of low-flow velocities compared with colour Doppler.
“Power Doppler is also virtually angle independent which allows better detection of low-flow velocities compared with colour Doppler [58–60].”
From Volume and vascularity: Using ultrasound to unlock the secrets of the first trimester placenta (2019) · cites this paper as [60]
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- Authors
- Hernandez‐Andrade, E., Jansson, T., Ley, D., Bellander, M., Persson, M., Lingman, G., & Maršál, K.
- Affiliations
- Lund University (SE)
- Corresponding author
- Hernandez‐Andrade, E.
- Venue
- Ultrasound in Obstetrics & Gynecology
- Publisher
- Wiley
- Published
- 2004-02-24
- Volume
- 23
- Issue
- 4
- Pages
- 363-368
- ISSN
- 0960-7692 (ISSN-L)
- 1469-0705
- OpenAlex
- W2154582966
- Cited by
- 58
- References
- 19
- Citations by year
- 2026: 1 · 2025: 2 · 2024: 1 · 2023: 1 · 2022: 1 · 2021: 3 · 2019: 3 · 2018: 3 · 2017: 2 · 2016: 3 · 2015: 2 · 2014: 4 · 2013: 2 · 2012: 5
- FWCI
- 1.40
- Type
- journal article
- Language
- en
- Open access
- bronze
- doi.org
- Locations
- Ultrasound in Obstetrics and Gynecology (publishedVersion)
- PubMed (publishedVersion)
- Lund University Publications (Lund University) (submittedVersion)
- Funders
- Mexican National Council for Science and Technology (CONACyT)
- National Institute of Perinatal Medicine (INPer)
- Swedish Research Council (5980)
- Swedish Foundation for Strategic Research (SSF) (Project CORTECH)
- Topics
- Health Sciences › Medicine › Radiology, Nuclear Medicine and Imaging › Ultrasound Imaging and Elastography
- Health Sciences › Medicine › Critical Care and Intensive Care Medicine › Ultrasound in Clinical Applications
- Health Sciences › Medicine › Obstetrics and Gynecology › Pregnancy and preeclampsia studies
- Keywords
- fractional moving blood volume, power Doppler, fetal blood flow, radioactive microspheres, umbilical cord occlusion, fetal asphyxia, fetal sheep, method validation
- MeSH terms
- Adrenal Glands, Animals, Asphyxia, Blood Flow Velocity, Blood Volume Determination, Female, Fetus, Pregnancy, Sheep, Ultrasonography, Doppler, Models, Animal
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