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Title:
WIRELESS FREQUENCY-DIVISION MULTIPLEXED 3D MAGNETIC LOCALIZATION FOR LOW POWER SUB-MM PRECISION CAPSULE ENDOSCOPY
Document Type and Number:
WIPO Patent Application WO/2023/113910
Kind Code:
A3
Abstract:
Disclosed herein are systems and methods related to a capsule endoscopy, where a patient can swallow an ingestible capsule that records images of digestive tract, and a new in-body positioning system can precisely localize the capsule's position. Implementations include a new frequency-division multiplexing-based magnetic localization (FDMML) approach which leverages a higher frequency carrier in the low MHz range. The approach significantly reduces the reference excitation coil sizes and decreases the required excitation current by three orders of magnitude compared to prior work, making it practical for wearable systems. A fully integrated wireless receiver prototype is implemented in 180nm bulk CMOS and packaged in an ingestible pill form factor. The new scheme achieves the best experimentally demonstrated tracking accuracy in both 2D and 3D localization experiments, achieving a sub-mm mean absolute position error and consuming only 247pW while running at 100% duty cycle.

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Inventors:
SIDERIS CONSTANTINE (US)
RUSTOM MICHELLA (US)
Application Number:
PCT/US2022/046588
Publication Date:
September 14, 2023
Filing Date:
October 13, 2022
Export Citation:
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Assignee:
UNIV SOUTHERN CALIFORNIA (US)
International Classes:
A61B5/05; A61B5/07; G16H20/10
Foreign References:
US20190356178A12019-11-21
US20150149375A12015-05-28
US20150011874A12015-01-08
US20130043993A12013-02-21
US20140239943A12014-08-28
Other References:
HOW J.P., PRIGGE E.A.: "Signal Architecture for a Distributed Magnetic Local Positioning System", IEEE SENSORS JOURNAL, IEEE, USA, vol. 4, no. 6, 1 December 2004 (2004-12-01), USA, pages 864 - 873, XP011122381, ISSN: 1530-437X, DOI: 10.1109/JSEN.2004.833512
Attorney, Agent or Firm:
YU, Jianing G. et al. (US)
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