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http://dx.doi.org/10.9717/kmms.2016.19.2.375

Design of External Coil System for Reducing Artifact of MR Image due to Implantable Hearing Aid  

Ahn, Hyoung Jun (Advanced Automotive Convergence Parts IT Research Center, Future Technology R& D Division, Gyeongbuk Institute of IT Convergence Industry Technology)
Lim, Hyung-Gyu (School of Electronics Eng., College of IT Eng., Kyungpook National University)
Kim, Myoung Nam (Dept. of Biomedical Eng., School of Medicine, Kyungpook National University)
Cho, Jin-Ho (School of Electronics Eng., College of IT Eng., Kyungpook National University)
Publication Information
Journal of Korea Multimedia Society / v.19, no.2, 2016 , pp. 375-385 More about this Journal
Abstract
Recently, several implantable hearing aids such as cochlear implant, middle ear implant, etc., which have a module receiving power and signal from outside the body, are frequently used to treat the hearing impaired patients. Most of implantable hearing aids are adopted permanent magnet pairs to couple between internal and external devices for the enhancement of power transmission. Generally, the internal device which containing the magnet in the center of receiving coil is implanted under the skin of human temporal bone. In case of MRI scanning of a patient with the implantable hearing aid, however, homogeneous magnetic fields of the MRI might be interfered by the implanted magnet. For the above reasons, the MR image is degraded by large area of artifact, so that diagnostics are almost impossible in deteriorated region. In this paper, we proposed an external coil system that can reduce the artifact of MR image due to the internal coupling magnet. By finite element analysis estimating area of MR artifact according to varying current and shape of the external coil, optimal coil parameters were extracted. Finally, the effectiveness of the proposed external coil system was verified by confirming the artifact at real MRI scan.
Keywords
Implantable Hearing Aid; MRI; Gradient Magnetic Field; Image Artifact;
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Times Cited By KSCI : 2  (Citation Analysis)
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1 Implantable Devices, http://www.implantable-device.com/ (accessed Jan., 15, 2016).
2 S.J. Lee, M.N. Kim, J.H. Lee, H.G. Lim and J.H. Cho, “Implementation of Implantable Bluetooth Bio-telemetry System for Transmitting Acoustic Signals in the Body with Wireless Recharging Function,” Journal of Korea Multimedia Society, Vol. 18, No. 5, pp. 652-662, 2015.   DOI
3 H.H. Kim and D.M. Barrs, “Hearing Aids: A Review of What’s New,” Journal of Otolaryngology-Head and Neck Surgery, Vol. 134, Issue 6, pp. 1043-1050, 2006.   DOI
4 D.D. Backous and W. Duke, “Implantable Middle Ear Hearing Devices: Current State of Technology and Market Challenge,” Current Opinion in Otolaryngology & Head and Neck Surgery, Vol. 14, No. 5, pp. 314-318, 2006.   DOI
5 A.V. Hodges and T.J. Balkany, “Cochlear Implants for Sensorineural Hearing Loss,” Hospital Physician, Vol. 38, No. 10, pp. 22-28, 2002.
6 B. Håkansson, M. Eeg-Olofsson, S. Reinfeldt, S. Stenfelt, and G. Granström, “Percutaneous Versus Transcutaneous Bone Conduction Implant System: A Feasibility Study on a Cadaver Head,” Otology & Neurotology, Vol. 29, No. 8, pp. 1132-1139, 2008.   DOI
7 P.R. Troyk, "Inductive Link Design for Miniature Implants," Proceedings of 31st Annual International Conference of the IEEE EMBS, pp. 204-209, 2009.
8 N. Yanagihara, Y. Hinohira, and K. Gyo, “Surgical Rehabilitation of Deafness with Partially Implantable Hearing Aid Using Piezoelectric Ceramic Bimorpli Ossicular Vibrator,” Auris Nasus Larynx, Vol. 24, pp. 91-98, 1997.   DOI
9 H.A. Jenkins, J.S. Atkins, D. Horlbeck, M.E. Hoffer, B. Balough, J.V. Arigo, G. Alexiades, and W. Garvis, “US Phase I Preliminary Results of Use of the Otologics MET Fully-Implantable Ossicular Stimulator,” Otolaryngology-Head and Neck Surgery, Vol. 137, No. 2, pp. 206-212, 2007.   DOI
10 J.A. Miller, G. Belanger, and T. Mussivand, “Development of an Autotuned Transcutaneous Energy Transfer System,” Journal of American Society for Artificial Internal Organs, Vol. 39, Issue 3, pp. 706-710, 1993.   DOI
11 F.G. Shellock, “Metallic Surgical Instruments for Interventional MRI Procedures: Evaluation of MR Safety,” Journal of Magnetic Resonance Imaging, Vol. 13, No. 1, pp. 152-157, 2001.   DOI
12 K. Böheim, Active Middle Ear Implants, Karger AG, Basel, 2010.
13 S.J. Ko, “Metal Artifact Caused by Magnetic Field Strength and Sequence on T1WI-MRI,” Journal of the Korea Contents Association, Vol. 10, No. 9, pp. 302-308, 2010.   DOI
14 D. Sinkiewicz, “MRI Scan Hazard,” British Dental Journal , Vol. 214, No. 8, p. 376, 2013.   DOI
15 E.S. Hochmair, “MRI Safety of Med-El C40/C40+ Cochlear Implants,” Cochlear Implants International, Vol. 2, No. 2, pp. 98-114, 2001.   DOI
16 K.R. Hwang and J.Y. Choi, “Middle Ear Implant,” Hanyang Medical Reviews, Vol. 35, No. 2, pp. 103- 107, 2015.   DOI
17 S. Deneuve, N. Loundon, N. Leboulanger, I. Rouillon, and E.N. Garabedian, “Cochlear Implant Magnet Displacement During Magnetic Resonance Imaging,” Otology and Neurotology, Vol. 29, No. 6, pp. 789-790, 2008.   DOI
18 Med-El Co. Webpage, http://www.medel.com/se/image-gallery/?versioncode=755452a54b (accessed Jan., 15, 2016).
19 Nucleus System, http://www.cochlear.com/wps/wcm/connect/uk/home/discover/cochlear-implants/nucleus-6-for-adults/nucleusimplant-portfolio (accessed Jan., 15, 2016).
20 Bonebridge Devices, http://www.medel.com/ bonebridge/ (accessed Jan., 15, 2016).
21 Kyungpook National University, Development of New Implantable Hearing Device Using Round Window Driving Transducer, A092106, 2014.
22 Med-El Announces FDA Approval of PULSAR, SONATA, and Med-El CONCERT Cochlear Implants for 1.5T MRI, http://s3.medel.com/pdf/US/Final_MRI_FDA_Approval_Press_Release_06_14_13.pdf (accessed Jan., 15, 2016).
23 O. Majdani, T.S. Rau, F. Gotz, M. Zimmerling, M. Lenarz, T. Lenarz, et al., “Artifacts Caused by Cochlear Implants with Non-removable Magnets in 3T MRI: Phantom and Cadaveric Studies,” European Archives of Oto-Rhino-Laryngology, Vol. 266, Issue 12, pp. 1885-1890, 2009.   DOI
24 G. Gerig, W. Kuoni, R. Kikinis, and O. Kübler, "Medical Imaging and Computer Vision: An Integrated Approach for Diagnosis and Planning," Proceedings of 11th DAGM Symposium on Computer Vision, pp. 425-432, 1989.
25 The Facts on Magnetic Resonance Imaging (MRI), http://www.cochlear.com/wps/wcm/connect/uk/home/discover/cochlear-implants/nucleus-6-for-adults/nucleus-implant-portfolio/mri-compatibility/the-facts-on-mri/the-facts-on-mri (accessed Jan., 15, 2016).
26 S.C. Bushong and G. Clarke, Magnetic Resonance Imaging: Physical and Biological Principles, Elsevier Health Sciences, U.S.A., 2013.
27 J.W. Shin, J.H. Kim, and H.K. Lee, “Magnetic Resonance Imaging in Cochlear Implant Patient,” Korean Journal of Otolaryngology-Head and Neck Surgery, Vol. 50, No. 10, pp. 938-940, 2007.
28 Y.G. Han, H.G. Lim, K.W. Seong, Y.S. Park, and J.H. Cho, "3-Poles Magnetic Coupler for Inductive Link of Transcutaneous Implantable Device in MR Imaging," Proceedings of the IASTED International Conference Biomedical Engineering, pp. 223-227, 2014.
29 Size Korea, http://sizekorea.kats.go.kr (accessed June, 15, 2016).
30 GoldSeal Certified Signa Excite MR 1.5 T, http://www3.gehealthcare.com/en/products/categories/goldseal_-_refurbished_systems/goldseal_magnetic_resonance/goldseal_signa_excite_15t (accessed Jan., 15, 2016).