\begin{thebibliography}{10} \bibitem{HARRIEHAUSEN.2020b} THOMAS HARRIEHAUSEN and Dieter Schwarzenau. \newblock {\em Moeller Grundlagen der Elektrotechnik}. \newblock {Springer Fachmedien Wiesbaden}, Wiesbaden, 24., durchges. u. korrig. auflage 2020 edition, 2020. \bibitem{Albach.2014} Manfred Albach. \newblock {\em Elektrotechnik}. \newblock Always learning. Pearson, M{\"u}nchen, 3. dr edition, 2014. \bibitem{Franz.2014} Alfred~M. Franz, Tam{\'a}s Haidegger, Wolfgang Birkfellner, Kevin Cleary, Terry~M. Peters, and Lena Maier-Hein. \newblock Electromagnetic tracking in medicine--a review of technology, validation, and applications. \newblock {\em IEEE transactions on medical imaging}, 33(8):1702--1725, 2014. \bibitem{.2019} {\em 2019 International Conference on Indoor Positioning and Indoor Navigation: 30 September-3 October 2019, Pisa, Italy}. \newblock IEEE, [Piscataway, NJ], 2019. \bibitem{Rey.2006} J.~F. Rey, S.~Ladas, A.~Alhassani, and K.~Kuznetsov. \newblock European society of gastrointestinal endoscopy (esge). video capsule endoscopy: update to guidelines (may 2006). \newblock {\em Endoscopy}, 38(10):1047--1053, 2006. \bibitem{Than.2012} Trung~Duc Than, Gursel Alici, Hao Zhou, and Weihua Li. \newblock A review of localization systems for robotic endoscopic capsules. \newblock {\em IEEE transactions on bio-medical engineering}, 59(9):2387--2399, 2012. \bibitem{Raabe.2002} Andreas Raabe, Ren{\'e} Krishnan, Robert Wolff, Elvis Hermann, Michael Zimmermann, and Volker Seifert. \newblock Laser surface scanning for patient registration in intracranial image-guided surgery. \newblock {\em Neurosurgery}, 50(4):797--801; discussion 802--3, 2002. \bibitem{Yin.2013} Minjie Yin, Xukun Shen, Yong Hu, and Xiaorui Fang. \newblock An automatic registration method based on fiducial marker for image guided neurosurgery system. \newblock In Gary Tan, Gee~Kin Yeo, Stephen~John Turner, and Yong~Meng Teo, editors, {\em AsiaSim 2013}, volume 402 of {\em Communications in Computer and Information Science}, pages 114--125. {Springer Berlin Heidelberg}, Berlin, Heidelberg, 2013. \bibitem{Schulz.2012} Chris Schulz, Stephan Waldeck, and Uwe~Max Mauer. \newblock Intraoperative image guidance in neurosurgery: development, current indications, and future trends. \newblock {\em Radiology research and practice}, 2012:197364, 2012. \bibitem{Orringer.2012} Daniel~A. Orringer, Alexandra Golby, and Ferenc Jolesz. \newblock Neuronavigation in the surgical management of brain tumors: current and future trends. \newblock {\em Expert review of medical devices}, 9(5):491--500, 2012. \bibitem{Stieglitz.2013} Lennart~Henning Stieglitz, Jens Fichtner, Robert Andres, Philippe Schucht, Ann-Kathrin Kr{\"a}henb{\"u}hl, Andreas Raabe, and J{\"u}rgen Beck. \newblock The silent loss of neuronavigation accuracy: a systematic retrospective analysis of factors influencing the mismatch of frameless stereotactic systems in cranial neurosurgery. \newblock {\em Neurosurgery}, 72(5):796--807, 2013. \bibitem{Cleary.2010} Kevin Cleary and Terry~M. Peters. \newblock Image-guided interventions: technology review and clinical applications. \newblock {\em Annual review of biomedical engineering}, 12:119--142, 2010. \bibitem{Putzer.2016} D.~Putzer, D.~Arco, B.~Schamberger, F.~Schanda, J.~Mahlknecht, G.~Widmann, P.~Schullian, W.~Jaschke, and R.~Bale. \newblock Elektromagnetische navigationssysteme im vergleich: Ct-gezielte punktionen an einem phantom. \newblock {\em RoFo : Fortschritte auf dem Gebiete der Rontgenstrahlen und der Nuklearmedizin}, 188(5):470--478, 2016. \bibitem{McMillen.2010} Jason~L. McMillen, Marianne Vonau, and Martin~J. Wood. \newblock Pinless frameless electromagnetic image-guided neuroendoscopy in children. \newblock {\em Child's nervous system : ChNS : official journal of the International Society for Pediatric Neurosurgery}, 26(7):871--878, 2010. \bibitem{Hermann.2012} Elvis~J. Hermann, Hans-Holger Capelle, Christoph~A. Tschan, and Joachim~K. Krauss. \newblock Electromagnetic-guided neuronavigation for safe placement of intraventricular catheters in pediatric neurosurgery. \newblock {\em Journal of neurosurgery. Pediatrics}, 10(4):327--333, 2012. \bibitem{Weiner.2015} Gregory~M. Weiner, Srinivas Chivukula, Ching-Jen Chen, Dale Ding, Johnathan~A. Engh, and Nduka Amankulor. \newblock Ommaya reservoir with ventricular catheter placement for chemotherapy with frameless and pinless electromagnetic surgical neuronavigation. \newblock {\em Clinical neurology and neurosurgery}, 130:61--66, 2015. \bibitem{Hayhurst.2009} Caroline Hayhurst, Patricia Byrne, Paul~R. Eldridge, and Conor~L. Mallucci. \newblock Application of electromagnetic technology to neuronavigation: a revolution in image-guided neurosurgery. \newblock {\em Journal of neurosurgery}, 111(6):1179--1184, 2009. \bibitem{Kuth.772006} Rainer Kuth, Johannes Reinschke, and Rudolf Rockelein. \newblock Method for determining the position and orientation of an endoscopy capsule guided through an examination object by using a navigating magnetic field generated by means of a navigation device, 2007. \bibitem{Wilding.2000} Ian Wilding, Peter Hirst, and Alyson Connor. \newblock Development of a new engineering-based capsule for human drug absorption studies. \newblock {\em Pharmaceutical Science {\&} Technology Today}, 3(11):385--392, 2000. \bibitem{Dumoulin.1993} C.~L. Dumoulin, S.~P. Souza, and R.~D. Darrow. \newblock Real-time position monitoring of invasive devices using magnetic resonance. \newblock {\em Magnetic resonance in medicine}, 29(3):411--415, 1993. \bibitem{Krieger.2005} Axel Krieger, Robert~C. Susil, Cynthia M{\'e}nard, Jonathan~A. Coleman, Gabor Fichtinger, Ergin Atalar, and Louis~L. Whitcomb. \newblock Design of a novel mri compatible manipulator for image guided prostate interventions. \newblock {\em IEEE transactions on bio-medical engineering}, 52(2):306--313, 2005. \bibitem{Fluckiger.2007} Michael Fl{\"u}ckiger and Bradley~J. Nelson. \newblock Ultrasound emitter localization in heterogeneous media. \newblock {\em Annual International Conference of the IEEE Engineering in Medicine and Biology Society. IEEE Engineering in Medicine and Biology Society. Annual International Conference}, 2007:2867--2870, 2007. \bibitem{Nagy.12.05.200917.05.2009} Z.~Nagy, M.~Fluckiger, O.~Ergeneman, S.~Pane, M.~Probst, and B.~J. Nelson. \newblock A wireless acoustic emitter for passive localization in liquids. \newblock In {\em 2009 IEEE International Conference on Robotics and Automation}, pages 2593--2598. IEEE, 12.05.2009 - 17.05.2009. \bibitem{Ibrahim.30.09.201903.10.2019} Ibrahim Ibrahim, Kai Rieger, Tobias Draeger, and Rafael Psiuk. \newblock Adaptive algorithm for estimating the position of a passive object in a picking shelf. \newblock In {\em 2019 International Conference on Indoor Positioning and Indoor Navigation (IPIN)}, pages 1--5. IEEE, 30.09.2019 - 03.10.2019. \bibitem{Mateen.2017} Haris Mateen, Rubel Basar, Afaz~Uddin Ahmed, and Mohd~Yazed Ahmad. \newblock Localization of wireless capsule endoscope: A systematic review. \newblock {\em IEEE Sensors Journal}, 17(5):1197--1206, 2017. \end{thebibliography}