Power Consumption Considerations for Ultrasound Capsule Endoscopy

Moldovan, A. C., Abaravicius, B., Mitra, S. and Cochran, S. (2023) Power Consumption Considerations for Ultrasound Capsule Endoscopy. In: 2023 IEEE International Ultrasonics Symposium (IUS), Montreal, Canada, 3-8 September 2023, ISBN 9798350346459 (doi: 10.1109/IUS51837.2023.10306773)

Abstract

Ultrasound capsule endoscopy (USCE) promises to combine the usefulness of the traditional endoscope with the increased comfort, reduced risks, and wider reach of a capsule for diagnosis of gastrointestinal tract (GIT) diseases. Equipped with a microultrasound (µUS) array operating at frequencies higher than 20 MHz, the USCE device can benefit from increased axial resolution, while the use of an array can provide a wider field of view via electronic beam-steering. However, reduced available power and limited physical dimensions are obstacles presently hindering the development of such medical devices. This paper proposes and evaluates US array driving techniques to reduce power consumption, discusses the limitations of receiving electronics and considers achievable B-mode imaging frame rates. Two array drivers were used in this study: a custom-made CMOS pulser, with details published previously, and a commercial research array controller (Vantage HF 128, Verasonics, WA, USA). Peak (i peak ) and average (i avg ) supply current measurements performed for a variable number of elements transmitting (Tx) simultaneously in a 28 MHz µUS array (Vermon, France) show that Tx apertures comprising <7 active elements are most suitable. Furthermore, because of the high i peak supplied to the array, charge storage on board the USCE device is required for any Tx configuration.

• Item Type: Conference Proceedings
• Additional Information: This work was carried out as part of the AUTOCAPSULE project funded by the European Union’s Horizon 2020 Research and Innovation Programme under grant agreement no. 952118.
• Status: Published
• Refereed: Yes
• Glasgow Author(s) Enlighten ID: Mitra, Dr Srinjoy and Cochran, Professor Sandy and Abaravicius, Bartas and Moldovan, Dr Alexandru
• Authors: Moldovan, A. C., Abaravicius, B., Mitra, S., and Cochran, S.
• College/School: College of Science and Engineering; College of Science and Engineering > School of Engineering > Electronics and Nanoscale Engineering; College of Science and Engineering > School of Engineering > Systems Power and Energy
• ISSN: 1948-5727
• ISBN: 9798350346459
• Copyright Holders: Copyright © 2023 IEEE
• First Published: First published in 2023 IEEE International Ultrasonics Symposium (IUS)
• Publisher Policy: Reproduced in accordance with the publisher copyright policy

Project Code	Award No	Project Name	Principal Investigator	Funder's Name	Funder Ref	Lead Dept
309776		AUTOCAPSULE	Alexander Cochran	European Commission (EC)	952118	ENG - Systems Power & Energy