Planar body-mounted sensors for electromagnetic tracking

Thumbnail Image
sensors-21-02822-v2.pdf(2.44 MB)
Published Version
Cavaliere, Marco
Jaeger, Herman Alexander
O'Donoghue, Kilian
Cantillon-Murphy, Pádraig
Journal Title
Journal ISSN
Volume Title
Published Version
Research Projects
Organizational Units
Journal Issue
Electromagnetic tracking is a safe, reliable, and cost-effective method to track medical instruments in image-guided surgical navigation. However, patient motion and magnetic field distortions heavily impact the accuracy of tracked position and orientation. The use of redundant magnetic sensors can help to map and mitigate for patient movements and magnetic field distortions within the tracking region. We propose a planar inductive sensor design, printed on PCB and embedded into medical patches. The main advantage is the high repeatability and the cost benefit of using mass PCB manufacturing processes. The article presents new operative formulas for electromagnetic tracking of planar coils on the centimetre scale. The full magnetic analytical model is based on the mutual inductance between coils which can be approximated as being composed by straight conductive filaments. The full model is used to perform accurate system simulations and to assess the accuracy of faster simplified magnetic models, which are necessary to achieve real-time tracking in medical applications.
Electromagnetic tracking , Registration , Image-guided surgery , Inductive sensor , Mutual inductance
Cavaliere, M., Jaeger, H. A., O'Donoghue, K. and Cantillon-Murphy, P. (2021) 'Planar body-mounted sensors for electromagnetic tracking', Sensors, 21(8), 2822 (20pp). doi: 10.3390/s21082822
Link to publisher’s version