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Using high resolution X-ray computed tomography to create an image based model of a lymph node.

L J Cooper1, B Zeller-Plumhoff1, G F Clough2

  • 1Faculty of Engineering and the Environment, University of Southampton, Highfield Campus, Southampton SO17 1BJ, UK.

Journal of Theoretical Biology
|April 22, 2018
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Summary
This summary is machine-generated.

High-resolution X-ray imaging reveals fluid flow dynamics within murine lymph nodes. Faster fluid transport through the node center may explain particle movement into the cortex, aiding immune responses.

Keywords:
Image based modellingLymphatic systemPorous media

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Area of Science:

  • Immunology
  • Biophysics
  • Medical Imaging

Background:

  • Lymph nodes are crucial for immune function, filtering lymphatic fluid.
  • Understanding fluid dynamics within lymph nodes is vital for immune cell behavior and node structure.
  • Experimental measurement of lymph node fluid flow is difficult due to size and fragility.

Purpose of the Study:

  • To visualize lymph node structures using high-resolution X-ray computed tomography.
  • To investigate the impact of these structures on fluid transport using an image-based model.
  • To explore potential mechanisms of particle transport within lymph nodes.

Main Methods:

  • Acquisition of high-resolution X-ray computed tomography images of a murine lymph node.
  • Development of an image-based computational model to simulate fluid transport.
  • Analysis of fluid velocity based on visualized lymph node structures and tissue permeability.

Main Results:

  • Phase contrast X-ray computed tomography provided high contrast imaging of lymph node structures.
  • Simulations indicated increased fluid velocity through interstitial channels.
  • Fluid flowed faster through the center of the node (afferent to efferent vessel) than around the periphery.

Conclusions:

  • High-resolution X-ray imaging and modeling can visualize lymph node fluid dynamics.
  • Differential fluid velocities within the lymph node may facilitate particle transport to the cortex.
  • This study offers insights into lymph node function and immune particle trafficking.