Orthopaedic implant micromotion sensing using an eddy current sensor

Rajas Khokle; Karu Esselle; Michael Heimlich; Desmond Bokor

doi:10.1109/LSC.2017.8268159

Orthopaedic implant micromotion sensing using an eddy current sensor

Rajas Khokle, Karu Esselle, Michael Heimlich, Desmond Bokor

Faculty of Medicine, Health and Human Sciences

Research output: Chapter in Book/Report/Conference proceeding › Conference proceeding contribution › peer-review

4 Citations (Scopus)

Abstract

An eddy current sensor can be deployed near an orthopaedic implant for detecting its micro motion as the person moves. A numerical investigation by using a finite element solver is done to investigate the feasibility of such sensor head. A two-turn loop is modelled inside a tibial bone surrounded by the muscle phantom. The inductance, resistance and Q factor of the sensor are evaluated over different standoff distances and frequencies for 10μm motion of the tibial implant. From this data, the sensitivity and the range of the sensor at different sensitivity levels are calculated. It is found that while the range of sensor increases with frequency, the tissue losses also increase. The sensor is experimentally tested using a cow bone and the results are explained.

Original language	English
Title of host publication	2017 IEEE Life Sciences Conference, LSC 2017
Place of Publication	Piscataway, NJ
Publisher	Institute of Electrical and Electronics Engineers (IEEE)
Pages	125-128
Number of pages	4
ISBN (Electronic)	9781538610305
ISBN (Print)	9781538610312
DOIs	https://doi.org/10.1109/LSC.2017.8268159
Publication status	Published - 2017
Event	1st International IEEE Life-Science Conference, LSC 2017 - Sydney, Australia Duration: 13 Dec 2017 → 15 Dec 2017

Conference

Conference	1st International IEEE Life-Science Conference, LSC 2017
Country/Territory	Australia
City	Sydney
Period	13/12/17 → 15/12/17

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10.1109/LSC.2017.8268159

Cite this

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title = "Orthopaedic implant micromotion sensing using an eddy current sensor",

abstract = "An eddy current sensor can be deployed near an orthopaedic implant for detecting its micro motion as the person moves. A numerical investigation by using a finite element solver is done to investigate the feasibility of such sensor head. A two-turn loop is modelled inside a tibial bone surrounded by the muscle phantom. The inductance, resistance and Q factor of the sensor are evaluated over different standoff distances and frequencies for 10μm motion of the tibial implant. From this data, the sensitivity and the range of the sensor at different sensitivity levels are calculated. It is found that while the range of sensor increases with frequency, the tissue losses also increase. The sensor is experimentally tested using a cow bone and the results are explained.",

author = "Rajas Khokle and Karu Esselle and Michael Heimlich and Desmond Bokor",

year = "2017",

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pages = "125--128",

booktitle = "2017 IEEE Life Sciences Conference, LSC 2017",

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note = "1st International IEEE Life-Science Conference, LSC 2017 ; Conference date: 13-12-2017 Through 15-12-2017",

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Khokle, R, Esselle, K, Heimlich, M & Bokor, D 2017, Orthopaedic implant micromotion sensing using an eddy current sensor. in 2017 IEEE Life Sciences Conference, LSC 2017. Institute of Electrical and Electronics Engineers (IEEE), Piscataway, NJ, pp. 125-128, 1st International IEEE Life-Science Conference, LSC 2017, Sydney, Australia, 13/12/17. https://doi.org/10.1109/LSC.2017.8268159

Orthopaedic implant micromotion sensing using an eddy current sensor. / Khokle, Rajas; Esselle, Karu; Heimlich, Michael et al.
2017 IEEE Life Sciences Conference, LSC 2017. Piscataway, NJ: Institute of Electrical and Electronics Engineers (IEEE), 2017. p. 125-128.

Research output: Chapter in Book/Report/Conference proceeding › Conference proceeding contribution › peer-review

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T1 - Orthopaedic implant micromotion sensing using an eddy current sensor

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N2 - An eddy current sensor can be deployed near an orthopaedic implant for detecting its micro motion as the person moves. A numerical investigation by using a finite element solver is done to investigate the feasibility of such sensor head. A two-turn loop is modelled inside a tibial bone surrounded by the muscle phantom. The inductance, resistance and Q factor of the sensor are evaluated over different standoff distances and frequencies for 10μm motion of the tibial implant. From this data, the sensitivity and the range of the sensor at different sensitivity levels are calculated. It is found that while the range of sensor increases with frequency, the tissue losses also increase. The sensor is experimentally tested using a cow bone and the results are explained.

AB - An eddy current sensor can be deployed near an orthopaedic implant for detecting its micro motion as the person moves. A numerical investigation by using a finite element solver is done to investigate the feasibility of such sensor head. A two-turn loop is modelled inside a tibial bone surrounded by the muscle phantom. The inductance, resistance and Q factor of the sensor are evaluated over different standoff distances and frequencies for 10μm motion of the tibial implant. From this data, the sensitivity and the range of the sensor at different sensitivity levels are calculated. It is found that while the range of sensor increases with frequency, the tissue losses also increase. The sensor is experimentally tested using a cow bone and the results are explained.

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Orthopaedic implant micromotion sensing using an eddy current sensor

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