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Updated: Jun 24, 2026
Contrast Imaging in Mouse Embryos Using High-frequency Ultrasound
Published on: March 4, 2015
Hemodynamic measurements from individual blood cells in early mammalian embryos with Doppler swept source OCT
Irina V Larina1, Steven Ivers, Saba Syed
1Molecular Physiology and Biophysics, Baylor College of Medicine, Houston, TX 77584, USA.
Insights
Researchers developed a new imaging technique to study early heart defects in mouse embryos. This method visualizes blood flow and cardiac function, aiding in the understanding of cardiovascular birth defects.
Area of Science:
- Developmental Biology
- Cardiovascular Science
- Biomedical Imaging
Background:
- Congenital cardiovascular (CV) defects are common and lethal.
- The mouse embryo is a key model for studying mammalian CV development.
- Existing tools lack the sensitivity to detect early, subtle cardiac functional deficits in mouse embryos.
Purpose of the Study:
- To develop and validate a novel imaging technique for early detection of cardiac function in mouse embryos.
- To assess the utility of swept source optical coherence tomography (SS-OCT) for analyzing embryonic cardiac hemodynamics.
Main Methods:
- Combined live mouse embryo culture with swept source optical coherence tomography (SS-OCT).
- Acquired structural 2D and 3D imaging of early mouse embryos (8.5 days post-fertilization).
- Utilized Doppler SS-OCT to measure blood cell velocity during the cardiac cycle.
Main Results:
- Successfully visualized individual circulating blood cells in live mouse embryos.
- Measured single blood cell velocities during different phases of the embryonic heartbeat.
- Demonstrated the capability of SS-OCT for high-resolution structural and hemodynamic analysis.
Conclusions:
- Doppler SS-OCT is a powerful tool for analyzing structural and hemodynamic parameters in early mammalian embryonic development.
- This technique enables the study of subtle cardiac function deficits crucial for understanding congenital heart defects.
- Advances in imaging technology are critical for early diagnosis and research into lethal birth defects.
Abstract:
The most common and lethal birth defects affect the cardiovascular (CV) system. The mouse is a superior model for identifying and understanding mammalian CV birth defects, but there is a great need for tools that can detect early and subtle deficiencies in cardiac function in mouse embryos. We combined swept source optical coherence tomography (SS-OCT) with live mouse embryo culture protocols to generate structural two-dimensional and three-dimensional imaging and hemodynamic measurements in a live 8.5 day embryo just a few hours after the beginning of a heartbeat. Our data show that individual circulating blood cells can be visualized with structural SS-OCT, and using Doppler SS-OCT the velocity of single moving blood cells were measured during different phases of the heartbeat cycle. These results demonstrate that Doppler SS-OCT is an extremely useful tool for structural and hemodynamic analysis at the earliest stages of mammalian blood circulation.
