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Related Experiment Videos

Blood flow estimation with harmonic Flash Echo Imaging.

W T Shi1, F Forsberg, J B Liu

  • 1Department of Radiology and Jefferson Ultrasound Education and Research Institute, Thomas Jefferson University, Philadelphia, PA, USA. bill@esther.rad.tju.edu

Ultrasonic Imaging
|April 18, 2002
PubMed
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Accurate blood flow estimation is crucial for organ function assessment. Harmonic Flash Echo imaging with microbubble contrast agents effectively measures blood volume flow rates both in vitro and in vivo.

Area of Science:

  • Medical Imaging
  • Ultrasound Technology
  • Hemodynamics

Background:

  • Blood volume flow estimation is vital for assessing internal organ function.
  • Ultrasound contrast agents, specifically microbubbles, are utilized for flow measurement.
  • Previous methods have limitations in accuracy and applicability.

Purpose of the Study:

  • To evaluate the efficacy of harmonic Flash Echo imaging for blood volume flow estimation.
  • To compare in vitro and in vivo flow measurements using this technique.
  • To validate the results against established flow measurement methods.

Main Methods:

  • Utilized Flash Echo Imaging in harmonic mode.
  • Administered microbubble-based ultrasound contrast agents.

Related Experiment Videos

  • Performed in vitro and in vivo (canine) flow estimations.
  • Correlated results with constant replenishment level and video intensity decay rate (in vitro).
  • Compared in vivo results with CVI-Q (time domain correlation) measurements.

    • Main Results:

    • In vitro flow volume rate showed correlation with constant replenishment level.
    • In vitro flow volume rate showed less correlation with video intensity decay rate.
    • In vivo volume flow rates in dogs closely matched CVI-Q measurements.
    • Harmonic Flash Echo imaging demonstrated accurate volume flow rate estimation.

    Conclusions:

    • Harmonic Flash Echo imaging is a reliable method for in vitro blood volume flow estimation.
    • This technique provides accurate in vivo blood volume flow rate measurements.
    • The findings support the use of harmonic Flash Echo imaging for functional organ evaluation.