A microwatt telemetry protocol for targeting deep implants

Shinnosuke Kawasaki; Indulakshmi  Subramaniam; Marta Saccher; Ronald Dekker

doi:10.1109/IUS52206.2021.9593603

A microwatt telemetry protocol for targeting deep implants

Shinnosuke Kawasaki, Indulakshmi Subramaniam, Marta Saccher, Ronald Dekker

Electronic Components, Technology and Materials

Research output: Chapter in Book/Conference proceedings/Edited volume › Conference contribution › Scientific › peer-review

3 Citations (Scopus)

62 Downloads (Pure)

Abstract

Implantable medical devices are becoming smaller and more deeply implanted in the human body for various applications (i.e., neurostimulation, drug delivery, bone fracture monitoring). Therefore, an efficient ultrasound power transfer link is needed to charge these devices. However, this is challenging because each ultrasound transducer has limited angular sensitivity. This work proposes a low-power telemetry protocol that can reliably feedback the power sent to the implant with backscattered ultrasound. The protocol works by sending two consecutive interrogation signals and connecting a circuit on the receiver that modulates only one of the two signals. The modulated signal can be decoded with an external ultrasound probe. In this work, the circuit was built, verified, and compared with simulation results. It was shown that the telemetry protocol could accurately localize the receiving ultrasound element at sub-mm precision at a 10 cm depth.

Original language	English
Title of host publication	2021 IEEE International Ultrasonics Symposium (IUS)
Subtitle of host publication	Proceedings
Place of Publication	Piscataway
Publisher	IEEE
Pages	1-4
Number of pages	4
ISBN (Electronic)	978-1-6654-0355-9
ISBN (Print)	978-1-6654-4777-5
DOIs	https://doi.org/10.1109/IUS52206.2021.9593603
Publication status	Published - 2021
Event	2021 IEEE International Ultrasonics Symposium (IUS) - Virtual at Xi'an, China Duration: 11 Sept 2021 → 16 Sept 2021

Publication series

Name	IEEE International Ultrasonics Symposium, IUS
ISSN (Print)	1948-5719

Conference

Conference	2021 IEEE International Ultrasonics Symposium (IUS)
Abbreviated title	IUS 2021
Country/Territory	China
City	Virtual at Xi'an
Period	11/09/21 → 16/09/21

Bibliographical note

Green Open Access added to TU Delft Institutional Repository ‘You share, we take care!’ – Taverne project https://www.openaccess.nl/en/you-share-we-take-care
Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public.

Keywords

pre-charged CMUT
backscattering
ultrasound power transfer
implantable medical device

Access to Document

10.1109/IUS52206.2021.9593603

A_microwatt_telemetry_protocol_for_targeting_deep_implantsFinal published version, 3.26 MB

Cite this

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title = "A microwatt telemetry protocol for targeting deep implants",

abstract = "Implantable medical devices are becoming smaller and more deeply implanted in the human body for various applications (i.e., neurostimulation, drug delivery, bone fracture monitoring). Therefore, an efficient ultrasound power transfer link is needed to charge these devices. However, this is challenging because each ultrasound transducer has limited angular sensitivity. This work proposes a low-power telemetry protocol that can reliably feedback the power sent to the implant with backscattered ultrasound. The protocol works by sending two consecutive interrogation signals and connecting a circuit on the receiver that modulates only one of the two signals. The modulated signal can be decoded with an external ultrasound probe. In this work, the circuit was built, verified, and compared with simulation results. It was shown that the telemetry protocol could accurately localize the receiving ultrasound element at sub-mm precision at a 10 cm depth.",

keywords = "pre-charged CMUT, backscattering, ultrasound power transfer, implantable medical device",

author = "Shinnosuke Kawasaki and Indulakshmi Subramaniam and Marta Saccher and Ronald Dekker",

note = "Green Open Access added to TU Delft Institutional Repository {\textquoteleft}You share, we take care!{\textquoteright} – Taverne project https://www.openaccess.nl/en/you-share-we-take-care Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public. ; 2021 IEEE International Ultrasonics Symposium (IUS), IUS 2021 ; Conference date: 11-09-2021 Through 16-09-2021",

year = "2021",

doi = "10.1109/IUS52206.2021.9593603",

language = "English",

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Kawasaki, S, Subramaniam, I, Saccher, M & Dekker, R 2021, A microwatt telemetry protocol for targeting deep implants. in 2021 IEEE International Ultrasonics Symposium (IUS): Proceedings., 9593603, IEEE International Ultrasonics Symposium, IUS, IEEE, Piscataway, pp. 1-4, 2021 IEEE International Ultrasonics Symposium (IUS), Virtual at Xi'an, China, 11/09/21. https://doi.org/10.1109/IUS52206.2021.9593603

A microwatt telemetry protocol for targeting deep implants. / Kawasaki, Shinnosuke; Subramaniam, Indulakshmi ; Saccher, Marta et al.
2021 IEEE International Ultrasonics Symposium (IUS): Proceedings. Piscataway: IEEE, 2021. p. 1-4 9593603 (IEEE International Ultrasonics Symposium, IUS).

Research output: Chapter in Book/Conference proceedings/Edited volume › Conference contribution › Scientific › peer-review

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AU - Subramaniam, Indulakshmi

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AU - Dekker, Ronald

N1 - Green Open Access added to TU Delft Institutional Repository ‘You share, we take care!’ – Taverne project https://www.openaccess.nl/en/you-share-we-take-care Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public.

PY - 2021

Y1 - 2021

N2 - Implantable medical devices are becoming smaller and more deeply implanted in the human body for various applications (i.e., neurostimulation, drug delivery, bone fracture monitoring). Therefore, an efficient ultrasound power transfer link is needed to charge these devices. However, this is challenging because each ultrasound transducer has limited angular sensitivity. This work proposes a low-power telemetry protocol that can reliably feedback the power sent to the implant with backscattered ultrasound. The protocol works by sending two consecutive interrogation signals and connecting a circuit on the receiver that modulates only one of the two signals. The modulated signal can be decoded with an external ultrasound probe. In this work, the circuit was built, verified, and compared with simulation results. It was shown that the telemetry protocol could accurately localize the receiving ultrasound element at sub-mm precision at a 10 cm depth.

AB - Implantable medical devices are becoming smaller and more deeply implanted in the human body for various applications (i.e., neurostimulation, drug delivery, bone fracture monitoring). Therefore, an efficient ultrasound power transfer link is needed to charge these devices. However, this is challenging because each ultrasound transducer has limited angular sensitivity. This work proposes a low-power telemetry protocol that can reliably feedback the power sent to the implant with backscattered ultrasound. The protocol works by sending two consecutive interrogation signals and connecting a circuit on the receiver that modulates only one of the two signals. The modulated signal can be decoded with an external ultrasound probe. In this work, the circuit was built, verified, and compared with simulation results. It was shown that the telemetry protocol could accurately localize the receiving ultrasound element at sub-mm precision at a 10 cm depth.

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Y2 - 11 September 2021 through 16 September 2021

ER -

A microwatt telemetry protocol for targeting deep implants

Abstract

Publication series

Conference

Bibliographical note

Keywords

Access to Document

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Pre-Charged Collapse-Mode CMUTs: A building block for future ultrasound

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