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Updated: Feb 17, 2026
Non-invasive Optical Imaging of the Lymphatic Vasculature of a Mouse
Published on: March 8, 2013
High-speed microscopy for in vivo monitoring of lymph dynamics
Mustafa Sarimollaoglu1, Amanda J Stolarz2, Dmitry A Nedosekin1
1Arkansas Nanomedicine Center, University of Arkansas for Medical Sciences, Little Rock, Arkansas.
Insights
This study introduces advanced microscopy for real-time imaging and quantification of lymphatic vessel function. The new system accurately measures lymphatic vessel diameter and cell flow velocity, aiding disease research.
Area of Science:
- Physiology
- Biomedical Engineering
- Microscopy
Background:
- The lymphatic system is crucial for maintaining fluid balance and immune function.
- Current methods for quantifying lymphatic function lack sufficient temporal resolution.
- Understanding lymphatic dynamics is vital for diagnosing and treating lymphatic disorders.
Purpose of the Study:
- To develop and validate an advanced bright-field microscopy system for high-resolution, in vivo imaging of lymphatic vessels (LVs).
- To enable automated quantification of lymphatic function, including vessel diameter changes and cellular flow velocity.
- To investigate lymphatic dysfunction in a lymphedema rat model.
Main Methods:
- Utilized advanced bright-field microscopy for continuous, high-speed video recording (up to 540 fps) of lymphatic vessels.
- Developed a novel edge detection algorithm for monitoring vessel diameter and cell tracking for flow velocity estimation.
- Validated the system in vitro with microspheres and in vivo using a rat model of surgical lymphadenectomy.
Main Results:
- The system achieved a temporal resolution of 2 milliseconds for lymphatic function quantification.
- In vitro validation demonstrated accurate measurement of flow velocities up to 4 cm/second.
- In vivo studies revealed reduced mesenteric lymphatic vessel contraction and flow rate in a lymphedema model.
Conclusions:
- The developed imaging system provides unprecedented temporal resolution for studying lymphatic dynamics.
- This technology offers a powerful tool for investigating lymphatic system diseases and evaluating therapeutic interventions.
- The system facilitates a deeper understanding of lymphatic vessel behavior in physiological and pathological conditions.
Abstract:
The lymphatic system contributes to body homeostasis by clearing fluid, lipids, plasma proteins and immune cells from the interstitial space. Many studies have been performed to understand lymphatic function under normal conditions and during disease. Nevertheless, a further improvement in quantification of lymphatic behavior is needed. Here, we present advanced bright-field microscopy for in vivo imaging of lymph vessels (LVs) and automated quantification of lymphatic function at a temporal resolution of 2 milliseconds. Full frame videos were compressed and recorded continuously at up to 540 frames per second. A new edge detection algorithm was used to monitor vessel diameter changes across multiple cross sections, while individual cells in the LVs were tracked to estimate flow velocity. The system performance initially was verified in vitro using 6- and 10-μm microspheres as cell phantoms on slides and in 90-μm diameter tubes at flow velocities up to 4 cm/second. Using an in vivo rat model, we explored the mechanisms of lymphedema after surgical lymphadenectomy of the mesentery. The system revealed reductions of mesenteric LV contraction and flow rate. Thus, the described imaging system may be applicable to the study of lymphatic behavior during therapeutic and surgical interventions, and potentially during lymphatic system diseases.
