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Echocardiography plays a role in assessing cardiac health and detecting heart conditions, with various types providing critical insights for diagnosis and treatment.
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|July 31, 2024
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Researchers developed dual-modal imaging microbeads for transarterial embolization (TAE). These novel embolic agents offer improved X-ray and ultrasound visibility, enhancing minimally invasive treatments for various conditions.

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embolic microsphereiodinated oilmulti‐interface structuretransarterial embolizationultrasound imaging

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Area of Science:

  • Biomaterials Science
  • Medical Imaging
  • Interventional Radiology

Background:

  • Microsphere-based embolic agents are crucial for transarterial embolization (TAE) in treating hypervascular tumors and bleeding.
  • Current microspheres face challenges in achieving simultaneous long-term, real-time X-ray and ultrasound imaging.

Purpose of the Study:

  • To develop novel emulsion-based dual-modal imaging microbeads for enhanced transarterial embolization (TAE) treatment.
  • To overcome limitations in real-time imaging for embolic agents used in minimally invasive therapies.

Main Methods:

  • Fabrication of microbeads using a droplet-based microfluidic method, creating an oil-in-water (O/W) emulsion.
  • Incorporation of radiopaque iodinated oil (IO) into a crosslinked CaAlg-based aqueous matrix.
  • Characterization of microbead properties including imaging visibility, deliverability, and drug release.

Main Results:

  • The developed CaAlg-IO microbeads demonstrated superior X-ray imaging due to high iodine content (221 mgI mL⁻¹).
  • Excellent ultrasound imaging capability was achieved, attributed to the O/W emulsion's multi-interface structure.
  • The microbeads exhibited favorable microcatheter deliverability and extended drug release due to biodegradation.

Conclusions:

  • Emulsion-based dual-modal imaging microbeads offer a promising platform for improving TAE.
  • The unique multi-phased structure enhances both embolization performance and imaging assessment capabilities.
  • This technology advances minimally invasive treatment options for various vascular conditions.