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An open electromagnetic tracking framework applied to targeted liver tumour ablation

  • Stephen Hinds
  • Herman Alexander JaegerEmail author
  • Richard Burke
  • Brodie O’Sullivan
  • Joseph Keane
  • Fabian Trauzettel
  • Bruno Marques
  • Stéphane Cotin
  • Brian Bird
  • Håkon Olav Leira
  • Erlend Fagertun Hofstad
  • Ole Vegard Solberg
  • Thomas Langø
  • Pádraig Cantillon-Murphy
Original Article
  • 201 Downloads

Abstract

Purpose

Electromagnetic tracking is a core platform technology in the navigation and visualisation of image-guided procedures. The technology provides high tracking accuracy in non-line-of-sight environments, allowing instrument navigation in locations where optical tracking is not feasible. EMT can be beneficial in applications such as percutaneous radiofrequency ablation for the treatment of hepatic lesions where the needle tip may be obscured due to difficult liver environments (e.g subcutaneous fat or ablation artefacts). Advances in the field of EMT include novel methods of improving tracking system accuracy, precision and error compensation capabilities, though such system-level improvements cannot be readily incorporated in current therapy applications due to the ‘blackbox’ nature of commercial tracking solving algorithms.

Methods

This paper defines a software framework to allow novel EMT designs, and improvements become part of the global design process for image-guided interventions. An exemplary framework is implemented in the Python programming language and demonstrated with the open-source Anser EMT system. The framework is applied in the preclinical setting though targeted liver ablation therapy on an animal model.

Results

The developed framework was tested with the Anser EMT electromagnetic tracking platform. Liver tumour targeting was performed using the tracking framework with the CustusX navigation platform using commercially available electromagnetically tracked needles. Ablation of two tumours was performed with a commercially available ablation system. Necropsy of the tumours indicated ablations within 5 mm of the tumours.

Conclusions

An open-source framework for electromagnetic tracking was presented and effectively demonstrated in the preclinical setting. We believe that this framework provides a structure for future advancement in EMT system in and customised instrument design.

Keywords

Image-guided intervention Electromagnetic tracking Surgical navigation 

Notes

Acknowledgements

This work was support by Science Foundation Ireland technical innovation and development award number 17/TIDA/4897. The authors would like to acknowledge the support of IHU Strasbourg surgical platform.

Compliance with ethical standards

Conflict of interest

The authors declare that they have no conflict of interest.

Ethical approval

Animal studies were performed at the Institute for Image-Guided Surgery (IHU), Strasbourg, France. All applicable international, national, and/or institutional guidelines for the care and use of animals were followed. All procedures performed in studies involving animals were in accordance with the ethical standards of the institution at which the studies were conducted.

Supplementary material

Supplementary material 1 (mp4 14848 KB)

Supplementary material 2 (mp4 112814 KB)

Supplementary material 3 (mp4 82693 KB)

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Copyright information

© CARS 2019

Authors and Affiliations

  1. 1.University College CorkCorkIreland
  2. 2.INRIAStrasbourgFrance
  3. 3.Bon Secours HospitalCorkIreland
  4. 4.Sunbeam Veterinary HospitalCorkIreland
  5. 5.SINTEFTrondheimNorway

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