Open Source Electromagnetic Trackers
From NAMIC Wiki
Home < Open Source Electromagnetic Trackers
In the photo, each of the three receiver coils is ten millimeters long, and is a [Sonion] T 20 AG telecoil usually used in hearing aids.
Key Personnel
- Peter Traneus Anderson
- Tina Kapur
- Sonia Pujol
Goals of the Project
To teach the process of developing electromagnetic trackers for research, to foster an open community of researchers developing electromagnetic trackers, to develop open-source software and open-source hardware for working research electromagnetic trackers interfacing to Slicer through OpenIGTLink.
Current Progress
6DOF Electromagnetic Tracker Construction HOWTO
References
- Project started at 2011 Summer Project Week
- Frederick H. Raab, "Quasi-Static Magnetic-Field Technique for Determining Position and Orientation", IEEE Transactions on Geoscience and Remote Sensing, Vol. GE-19, No. 4, October 1981, pages 235-243. Direct solution for 6DOF tracker.
- C.A. Nafis, V. Jensen, L. Beauregard, P.T. Anderson, "Method for estimating dynamic EM tracking accuracy of Surgical Navigation tools", SPIE Medical Imaging Proceedings, 2006. Reports low-cost accuracy-measuring techniques and results for various trackers.
- C. L. Dolph, "A current distribution for broadside arrays which optimizes the relationship between beam width and sidelobe level," Proc. IRE, Vol. 35, pp. 335-348, June, 1946. The original Dolph-Chebyshev Fourier-transform window article. Dolph-Chebyshev window can give 140 dB rejection in the stopband.
- Albert H. Nuttall, "Some Windows with Very Good Sidelobe Behavior", IEEE Transactions on Acoustics, Speech, and Signal Processing 29 (1) 84-91, doi:10.1109/TASSP.1981.1163506, "U.S. Government work not subject to U.S. copyright", in particular Figure 10 window for -L/2 < t < L/2: w(t) = (1/L) (10/32 + 15/32 cos(2pi t/L) + 6/32 cos(4pi t/L) + 1/32 cos(6pi t/L)) has first sidelobe at -61 dB and 42 dB/octave sidelobe rolloff.
- Eugene Paperno, "Suppression of magnetic noise in the fundamental-mode orthogonal fluxgate", Elsevier, Sensors and Actuators A 116 (2004) 405-409. Picotesla noise in 20 mm long 1 mm diameter fluxgate magnetometer.