Abstract
Electromagnetic trackers are greatly affected by magnetic field distortion resulting from metal objects and electronic equipment in close proximity. In this paper, we propose a rapid method for magnetic tracker calibration using a magneto-optic hybrid tracker. Although the calibration data can be acquired by freehand using the hybrid tracker, two problems arise as a result of freehand acquisition. One is the error caused by the time delay between the measurements of optical and magnetic trackers. The other is the inconsistency of calibration accuracy resulting from variations on uniformity and density of the freehand acquisition of calibration data. To overcome the problem of error, we developed a temporal calibration procedure to estimate the time delay and apply it accordingly. For the problem of inconsistent calibration accuracy, we formulated a distortion model selection method using a cross-validation technique with five distortion models obtained by 0-th to 4-th degree polynomial fitting to the calibration data. We experimentally evaluated the method in a setting affected by an actual operating table. By combining the temporal calibration and model selection methods, the error caused by the magnetic distortion was reduced from around 40 mm to less than 2 mm, and 30 seconds were needed to obtain the calibration data for a 200 × 200 × 20 mm3 volume.
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Zachmann, G.: Virtual reality in assembly simulation – collision detection, simulation algorithms, and interaction techniques, PhD Dissertation, TU Darmstadt (2000)
Ikits, M., et al.: An improved calibration framework for electromagnetic tracking devices. In: IEEE Virtual Reality 2001 (2001)
Nakamoto, M., et al.: 3D ultrasound system using a magneto-optic hybrid tracker for augmented reality visualization in laparoscopic liver surgery. In: Dohi, T., Kikinis, R. (eds.) MICCAI 2002. LNCS, vol. 2489, pp. 148–155. Springer, Heidelberg (2002)
Livingston, M.A., et al.: Magnetic tracker calibration for improved augmented reality registration. Presence of Teleoperators and Virtual Environment 6, 532–546 (1997)
Kindratenko, V.V., et al.: A survey of electromagnetic position tracker calibration teckniques. Virtual Reality: Research, Development, and Applications 5, 169–182 (2001)
Birkfellner, W., et al.: Calibration of tracking systems in a surgical environment, vol. 17, pp. 737–741 (1998)
Nakamoto, M., et al.: Magneto-optic hybrid 3D sensor for surgical navigation. In: Delp, S.L., DiGoia, A.M., Jaramaz, B. (eds.) MICCAI 2000. LNCS, vol. 1935, pp. 839–848. Springer, Heidelberg (2000)
Nixon, M., et al.: The effects of metals and interfering fields on electromagnetic trackers. Presence: Teleoperators and Virtual Environments 7, 204–218 (1998)
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Nakada, K., Nakamoto, M., Sato, Y., Konishi, K., Hashizume, M., Tamura, S. (2003). A Rapid Method for Magnetic Tracker Calibration Using a Magneto-Optic Hybrid Tracker. In: Ellis, R.E., Peters, T.M. (eds) Medical Image Computing and Computer-Assisted Intervention - MICCAI 2003. MICCAI 2003. Lecture Notes in Computer Science, vol 2879. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-540-39903-2_36
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DOI: https://doi.org/10.1007/978-3-540-39903-2_36
Publisher Name: Springer, Berlin, Heidelberg
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