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Development and Characteristics of a Dual-Layered Vascular Phantom.

Kaitlyn M Elmer1, Cassidy Caffin1, Breeanna Scott1

  • 1Department of Biomedical Engineering, University of Arkansas, Fayetteville, AR, USA.

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Summary

Researchers developed a novel dual-layer cardiovascular phantom using 3D printing and tissue-mimicking gel. This reproducible phantom accurately mimics human tissue properties for biomedical research applications.

Keywords:
3D printingGelsMulti-layer phantomsPhantomsResin printingTissue mimicsVat photopolymerization

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Area of Science:

  • Biomedical Engineering
  • Materials Science

Background:

  • Cardiovascular phantoms are crucial for biomedical research, enabling controlled studies of complex vascular geometries.
  • Mimicking the intricate layers of human tissue in phantoms remains a significant challenge.

Purpose of the Study:

  • To create a novel dual-layer cardiovascular phantom that overcomes limitations in mimicking human tissue layers.
  • To develop a reproducible phantom suitable for advanced imaging techniques like microCT scanning.

Main Methods:

  • The interior lumen was fabricated using 3D-printed elastic vat-photopolymerization resin.
  • This lumen was then cast within a standard tissue-mimicking ballistics gel to form the dual-layer structure.
  • Mechanical properties (Young's modulus, UTS, elongation at break) of the resin were characterized.

Main Results:

  • The resulting dual-layer phantoms were reproducible, semi-transparent, and compatible with microCT scanning.
  • The 3D-printed elastic material exhibited a Young's modulus of 12 ± 3.2 MPa, UTS of 1.27 ± 0.44 MPa, and elongation at break of 29 ± 9%.
  • These mechanical properties fall within the physiological ranges of human tissues, with a moderate correlation between sample thickness and stiffness.

Conclusions:

  • The developed methods provide a reproducible and effective approach for creating dual-layer cardiovascular phantoms.
  • These phantoms are suitable for diverse biomedical research and development applications requiring accurate tissue mimicry.