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Creating an open source community for electromagnetic tracking systems.


Discover Anser EMT

The first open-source electromagnetic tracking system. This paper details the design and specification of an electromagnetic tracking system for research and pre-clinical testing. Experiments were conducted in collaboration with the German Cancer Research Centre (DKFZ) in Heidelberg, Germany.

H. Jaeger et al., Int. J. Comput. Assist. Radiol. Surg. 2017 Jun;12(6):1059-1067. doi: 10.1007/s11548-017-1568-7

  • IPCAI presentation available here
  • Paper available here
  • Open Science Framework webpage available here

The Anser system design documentation is available here.

Tiled Field Generators

Anser EMT can be configured with multiple field generators to form larger tracking volumes. The design of the field generator can be found [[Field generator] here]. The square nature of the design provides the potentially unlimited tiling configuration for different tracking applications.

H. Jaeger et al., IEEE Trans. Instrum. Meas., 2019 Dec;18(9):3059, doi: 10.1109/TIM.2019.2900884

Distortion Detection

The Anser EMT field generator can be configured to detect the presence of the metal objects in the vicinity of the tracking volume. Metal objects introduce tracking errors in the form of ferromagnetic and Eddy current distortion. The ability to detect and localise the origin of these distortions is the first step in mitigating their error causing effects.

H. Jaeger et al., Sensors, 2018 Sep;68(2):4845-4852, doi: 10.3390/s18093059

Lung Navigation

Electromagnetic tracking is a useful tool in navigating the human airways enabling more effective diagnosis and treatment of lung cancer. We show the first use of Anser EMT in a pre-clinical setting by performing electromagnetic navigation bronchscopy (ENB) on a pig. The open-source medical imaging software CustusX was used to visualise the EMT position data within the airways. This work was performed in collaboration with the Norwegian Foundation for Industrial and Technical Research SINTEF.

H. Jaeger et al., Minimally Invasive Therapy & Allied Technologies, 2018 Nov;28(6):363-372, doi: 10.1080/13645706.2018.1544911

Liver Biopsy

Needle tracking for biopsy is an important application of EMT technology as it enables clincians to precisely navigate the needle's tip to perform biopsy. In this study we apply the Anser EMT system to target liver tumours in a pig and perform targeted ablation therapy.

S. Hinds et al., Int. J. Comput. Assist. Radiol. Surg. 2019 Apr;14(9):1475–1484. doi: 10.1007/s11548-019-01983-5

Anser EMT Software

  • Matlab implementation available here.
  • Cross-platform Python implementation available here.
  • Graphical User Interface (GUI) version available here.

Anser EMT Hardware

  • Field generator PCB design available here. (Requires Altium Designer)
  • Base station PCB design available here. (Requires Altium Designer)