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Updated: Aug 30, 2025
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Formulation and Acoustic Modulation of Optically Vaporized Perfluorocarbon Nanodroplets
Published on: July 16, 2021
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Low-boiling Point Perfluorocarbon Nanodroplets as Dual-Phase Dual-Modality MR/US Contrast Agent
Christian T McHugh1,2, Phillip G Durham3, Sebastian Atalla1,2
1Department of Physics & Astronomy, The University of North Carolina at Chapel Hill, Chapel Hill, NC 27599, US.
Summary
Researchers developed a new dual-phase, dual-modality contrast agent for magnetic resonance (MR) and ultrasound (US) imaging. This agent, based on perfluorocarbons, transitions between liquid and gas states, enhancing imaging capabilities.
Area of Science:
- Biomedical Imaging
- Magnetic Resonance Imaging (MRI)
- Ultrasound (US)
- Hyperpolarized Contrast Agents
Background:
- Hyperpolarized 129Xe enhanced magnetic resonance (MR) imaging allows detection of gas microbubbles at low concentrations.
- In vivo application of hyperCEST for microbubble detection is limited by lung signal saturation.
- Perfluorocarbon nanodroplets offer an alternative, with 129Xe resonating at a distinct chemical shift.
Purpose of the Study:
- To investigate perfluorocarbons as phase-dependent hyperCEST contrast agents.
- To demonstrate MR detection of ultrasound-mediated phase transitions in perfluorocarbons.
- To evaluate perfluorocarbons as a dual-modality (MR/US) contrast agent.
Main Methods:
- Utilized hyperCEST (Chemical Exchange Saturation Transfer) for MR detection.
- Employed low-boiling point perfluorocarbons in both liquid and gas phases.
- Applied ultrasound to induce phase transition from liquid nanodroplets to gas microbubbles.
Main Results:
- Low-boiling point perfluorocarbons generated phase-dependent hyperCEST contrast.
- Demonstrated successful MR detection of ultrasound-mediated phase transitions.
- Confirmed the dual-phase capability of the perfluorocarbon agents.
Conclusions:
- Perfluorocarbons can serve as effective phase-dependent hyperCEST contrast agents.
- Ultrasound-mediated phase transition is detectable by MR.
- These perfluorocarbons show promise as a dual-modality MR/US contrast agent.
