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Updated: Jan 5, 2026
06:02
Multi-timescale Microscopy Methods for the Characterization of Fluorescently-labeled Microbubbles for Ultrasound-Triggered Drug Release
Published on: June 12, 2021
4.3K
Optimal Control of SonoVue Microbubbles to Estimate Hydrostatic Pressure.
Summary
Microbubble ultrasound contrast agents like SonoVue show potential for non-invasively estimating cardiac and aortic pressures. Their subharmonic response varies with pressure, offering a new diagnostic avenue.
Area of Science:
- Biomedical Engineering
- Ultrasound Physics
- Cardiovascular Diagnostics
Background:
- Invasive pressure catheterization is standard for assessing cardiac and aortic pressures.
- Non-invasive methods are needed to evaluate cardiac contractility and stiffness.
- Microbubble ultrasound contrast agents offer potential as pressure sensors.
Purpose of the Study:
- To investigate the subharmonic response of SonoVue microbubbles under physiological pressures.
- To determine if SonoVue can be used for non-invasive pressure estimation.
- To elucidate the mechanisms behind the microbubble pressure response.
Main Methods:
- Utilized a static pressure phantom with SonoVue microbubbles.
- Recorded radio frequency data using the ULtrasound Advanced Open Platform (ULA-OP).
- Analyzed subharmonic amplitude across varying hydrostatic pressures (0-200 mmHg) and ultrasound parameters.
Main Results:
- SonoVue's subharmonic amplitude increased with pressure up to 50 mmHg.
- Amplitude decreased at pressures above 50 mmHg, potentially due to shell buckling and destruction.
- A specific operating regime for pressure estimation was identified.
Conclusions:
- The subharmonic signal of SonoVue is pressure-dependent.
- This pressure-dependent response offers a potential method for non-invasive blood pressure estimation.
- Further research can refine this technique for clinical application.
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