Bonmati Coll, E;
Hu, Y;
Gurusamy, K;
Davidson, B;
Pereira, SP;
Clarkson, MJ;
Barratt, DC;
(2017)
Assessment of Electromagnetic Tracking Accuracy for Endoscopic Ultrasound.
In: Peters, T and Yang, G and Navab, N and Mori, K and Luo, X and Reichl, T and McLeod, J, (eds.)
Computer-Assisted and Robotic Endoscopy.
(pp. pp. 36-47).
Springer International Publishing AG
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Abstract
Endoscopic ultrasound (EUS) is a minimally-invasive imaging technique that can be technically difficult to perform due to the small field of view and uncertainty in the endoscope position. Electromagnetic (EM) tracking is emerging as an important technology in guiding endoscopic interventions and for training in endotherapy by providing information on endoscope location by fusion with pre-operative images. However, the accuracy of EM tracking could be compromised by the endoscopic ultrasound transducer. In this work, we quantify the precision and accuracy of EM tracking sensors inserted into the working channel of a flexible endoscope, with the ultrasound transducer turned on and off. The EUS device was found to have little (no significant) effect on static tracking accuracy although jitter increased significantly. A significant change in the measured distance between sensors arranged in a fixed geometry was found during a dynamic acquisition. In conclusion, EM tracking accuracy was not found to be significantly affected by the flexible endoscope.
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