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Magnetic field design for selecting and aligning immunomagnetic labeled cells.
Arjan G J Tibbe1, Bart G de Grooth, Jan Greve
1Biophysical Techniques Group, Faculty of Applied Physics, Twente University, PO Box 217, 7500 AE Enschede, The Netherlands. A.G.J.Tibbe@tn.utwente.nl
Cytometry
|March 14, 2002
Summary
The CellTracks system uses magnetic fields to precisely select and align cells. Optimized magnet and nickel line design enables efficient, single-step cell extraction and alignment from suspensions.
Area of Science:
- Biophysics
- Cell Biology
- Magnetic Field Design
Background:
- Introduced the CellTracks cell analysis system for sample preparation.
- System utilizes immunomagnetic selection, separation, and alignment of cells along ferromagnetic lines.
Purpose of the Study:
- Describe underlying magnetic principles for cell selection and alignment.
- Optimize magnetic field design for enhanced cell analysis.
Main Methods:
- Employed computer simulations and experimental data for optimization.
- Tested designs with magnetically and fluorescently labeled 6-micrometer polystyrene beads.
Main Results:
- Achieved homogeneous cell distribution using a tilted-pole face magnet.
- Optimal alignment occurred when line spacing was less than or equal to object diameter.
Conclusions:
- Designed magnet extracts and homogenously distributes magnetically labeled cells.
- Ferromagnetic nickel lines create local gradients, aligning cells in a single step.