Experimental microsphere targeting in a representative hepatic artery system.

Area of Science:

• Medical Imaging and Interventional Radiology
• Biomedical Engineering
• Computational Fluid Dynamics

Background:

• Direct tumor targeting in radioembolization relies on precise delivery of microspheres.
• Computational fluid-particle modeling of hepatic arteries shows promise for predicting particle distribution.
• Experimental validation is crucial to assess the clinical feasibility of these simulation theories.

Purpose of the Study:

• To experimentally validate computational fluid-particle modeling for hepatic artery microsphere distribution.
• To assess the feasibility of using particle release position for targeted radioembolization.
• To compare simulation predictions with experimental results in a scaled hepatic model.

Main Methods:

• Fabrication of a scaled hepatic artery model with five outlet branches.
• Controlled release of neutrally buoyant microspheres from specific locations under steady flow conditions.
• Comparison of experimental microsphere distribution with computational fluid and particle transport simulations.

Main Results:

• Experimental microsphere distribution strongly correlated with computational predictions.
• Microsphere distribution demonstrated a clear dependence on injection location.
• Precise targeting of individual hepatic artery branches was achieved in the experimental model.

Conclusions:

• The simulation methodology is validated for achieving targeted microsphere distributions in hepatic arteries.
• Computational fluid-particle modeling shows significant potential for optimizing direct tumor targeting in radioembolization.
• This approach could enhance the efficacy and safety of liver cancer treatments.