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Tracking leukocytes in vivo with shape and size constrained active contours
Nilanjan Ray1, Scott T Acton, Klaus Ley
1Department of Electrical and Computer Engineering, the University of Virginia, Charlottesville, VA 22904, USA.
IEEE Transactions on Medical Imaging
|February 15, 2003
Summary
This study introduces a novel snake-based method for automatically tracking white blood cell movement during inflammation. This advanced technique improves accuracy and efficiency in analyzing leukocyte rolling for drug discovery.
Area of Science:
- Biomedical Engineering
- Cell Biology
- Immunology
Background:
- Inflammatory disease involves white blood cells (leukocytes) rolling along postcapillary venules.
- Quantifying leukocyte rolling is crucial for understanding and treating inflammation.
- Leukocyte rolling assays and intravital microscopy are key for screening and validating drug inhibitors.
Purpose of the Study:
- To develop an automated technique for tracking leukocyte movement.
- To enhance the accuracy and efficiency of leukocyte rolling analysis.
- To provide a tool for drug screening and validation in inflammatory disease research.
Main Methods:
- An active contour (snake-based) technique with a novel energy functional for shape and size constraints.
- Modified gradient vector flow for tracking high-speed leukocyte rolling.
- Energy-based implicit sampling and Kalman filter integration for enhanced tracking performance and occlusion handling.
Main Results:
- The proposed snake tracker significantly outperforms correlation and centroid-based trackers.
- Achieved reduced error in leukocyte localization and improved tracking success rates.
- Demonstrated superior performance in tracking fast-moving leukocytes, overcoming limitations of existing edge-based methods.
Conclusions:
- The developed snake tracker offers a promising automated data collection tool for inflammatory disease research.
- The method enhances the analysis of leukocyte recruitment dynamics.
- This technology can accelerate the screening and validation of potential anti-inflammatory drugs.
