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Accuracy of electromagnetic tracking with a prototype field generator in an interventional OR setting
Author(s) -
Bø Lars Eirik,
Leira Håkon Olav,
Tangen Geir Arne,
Hofstad Erlend Fagertun,
Amundsen Tore,
Langø Thomas
Publication year - 2012
Publication title -
medical physics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.473
H-Index - 180
eISSN - 2473-4209
pISSN - 0094-2405
DOI - 10.1118/1.3666768
Subject(s) - fluoroscopy , robustness (evolution) , medicine , interventional radiology , electromagnetic field , artificial intelligence , medical physics , computer vision , computer science , radiology , physics , biochemistry , chemistry , quantum mechanics , gene
Purpose: The authors have studied the accuracy and robustness of a prototype electromagnetic window field generator (WFG) in an interventional radiology suite with a robotic C‐arm. The overall purpose is the development of guidance systems combining real‐time imaging with tracking of flexible instruments for bronchoscopy, laparoscopic ultrasound, endoluminal surgery, endovascular therapy, and spinal surgery. Methods: The WFG has a torus shape, which facilitates x‐ray imaging through its centre. The authors compared the performance of the WFG to that of a standard field generator (SFG) under the influence of the C‐arm. Both accuracy and robustness measurements were performed with the C‐arm in different positions and poses. Results: The system was deemed robust for both field generators, but the accuracy was notably influenced as the C‐arm was moved into the electromagnetic field. The SFG provided a smaller root‐mean‐square position error but was more influenced by the C‐arm than the WFG. The WFG also produced smaller maximum and variance of the error. Conclusions: Electromagnetic (EM) tracking with the new WFG during C‐arm based fluoroscopy guidance seems to be a step forward, and with a correction scheme implemented it should be feasible.