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Related Concept Videos

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  3. Research Domains
  5. Engineering
  7. Fluid Mechanics And Thermal Engineering
  9. Aerodynamics (excl. Hypersonic Aerodynamics)
  11. A Novel Sonoablation Of Liver Tissue Based On Acoustic Droplet Vaporization: A Feasibility Study.
  1. Home
  3. Research Domains
  5. Engineering
  7. Fluid Mechanics And Thermal Engineering
  9. Aerodynamics (excl. Hypersonic Aerodynamics)
  11. A Novel Sonoablation Of Liver Tissue Based On Acoustic Droplet Vaporization: A Feasibility Study.

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A Novel Sonoablation of Liver Tissue Based on Acoustic Droplet Vaporization: A Feasibility Study.

Hui Li1, Jiabei Yin2, Xiaoxiao Dong1

  • 1Department of Ultrasound, Army Medical University Xinqiao Hospital, Chongqing 400037, China (H.L., J.Y., X.D., Z.L.).

Academic Radiology
|June 13, 2025

View abstract on PubMed

Summary
This summary is machine-generated.

An acoustically responsive scaffold (ARS) confines perfluoropentane (PFP) droplets for targeted histotripsy liver ablation. This method creates localized bubble clouds, enabling effective mechanical ablation with reduced off-target effects.

Keywords:
Acoustic droplet vaporizationAcoustically responsive scaffoldsPFP dropletSonoablation

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Area of Science:

  • Biomedical Engineering
  • Acoustic Medicine
  • Tissue Ablation Technologies

Background:

  • Histotripsy uses high peak negative pressure (PNP) for mechanical tissue ablation.
  • Exogenous cavitation nuclei, like perfluoropentane (PFP) droplets, can lower required PNP.
  • PFP droplet fluidity can lead to dispersion and non-target tissue damage during focused ultrasound (FUS) treatment.

Purpose of the Study:

  • To develop an innovative sonoablation strategy using an acoustically responsive scaffold (ARS).
  • To spatially confine PFP droplets and generate localized bubble clouds within the intended ablation zone.
  • To assess the efficacy of ARS-mediated FUS for targeted liver tissue damage.

Main Methods:

  • 15 New Zealand rabbits were divided into three groups based on different transducers (CK960, PRO2.1, PRO4.1).
  • ARS, a mixture including fibrinogen, DMEM, PFP microparticles, and thrombin, was injected into the rabbit liver mid-lobe.
  • The liver was treated with FUS after ARS injection, with optimal fibrinogen concentration determined to be 1.47 mg/mL.

    • Main Results:

    • ARS effectively restricted PFP droplet flow, creating localized, high-concentration bubble clouds.
    • Histological analysis (HE and Masson staining) revealed targeted cavitation necrosis and significant fibrosis in the liver target area.
    • Observed liver target damage areas were 6.86±2.62mm², 13.72±6.08mm², and 11.68±9.43mm² for the respective transducer groups.

    Conclusions:

    • ARS vaporization under FUS successfully produced concentrated bubble clouds in the target area.
    • This approach resulted in targeted liver damage without affecting surrounding tissue.
    • The study demonstrates ARS as an effective method for localized histotripsy ablation.