Intelligent magnetic manipulation for gastrointestinal ultrasound

Norton, J. C. et al. (2019) Intelligent magnetic manipulation for gastrointestinal ultrasound. Science Robotics, 4(31), eaav7725. (doi:10.1126/scirobotics.aav7725)

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Abstract

Diagnostic endoscopy in the gastrointestinal tract has remained largely unchanged for decades and is limited to the visualization of the tissue surface, the collection of biopsy samples for diagnoses, and minor interventions such as clipping or tissue removal. In this work, we present the autonomous servoing of a magnetic capsule robot for in situ, subsurface diagnostics of microanatomy. We investigated and showed the feasibility of closed-loop magnetic control using digitized microultrasound (μUS) feedback; this is crucial for obtaining robust imaging in an unknown and unconstrained environment. We demonstrated the functionality of an autonomous servoing algorithm that uses μUS feedback, both on benchtop trials and in vivo in a porcine model. We have validated this magnetic μUS servoing in instances of autonomous linear probe motion and were able to locate markers in an agar phantom with 1.0 ± 0.9 mm position accuracy using a fusion of robot localization and μUS image information. This work demonstrates the feasibility of closed-loop robotic μUS imaging in the bowel without the need for either a rigid physical link between the transducer and extracorporeal tools or complex manual manipulation.

Item Type:Articles
Status:Published
Refereed:Yes
Glasgow Author(s) Enlighten ID:Cox, Dr Benjamin F and Cochran, Professor Sandy and Lay, Dr Holly
Creator Roles:
Lay, H. S.Investigation, Validation, Writing – review and editing
Cox, B. F.Investigation, Validation, Writing – review and editing
Cochran, S.Conceptualization, Funding acquisition, Project administration, Resources, Supervision, Validation, Writing – review and editing
Authors: Norton, J. C., Slawinski, P. R., Lay, H. S., Martin, J. W., Cox, B. F., Cummins, G., Desmulliez, M. P.Y., Clutton, R. E., Obstein, K. L., Cochran, S., and Valdastri, P.
College/School:College of Science and Engineering > School of Engineering
College of Science and Engineering > School of Engineering > Systems Power and Energy
Journal Name:Science Robotics
Publisher:American Association for the Advancement of Science
ISSN:2470-9476
ISSN (Online):2470-9476
Published Online:19 June 2019
Copyright Holders:Copyright © 2019 The Authors
First Published:First published in Science Robotics 4(31): eaav7725
Publisher Policy:Reproduced in accordance with the publisher copyright policy

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Project CodeAward NoProject NamePrincipal InvestigatorFunder's NameFunder RefLead Dept
748241Sonopill: minimally invasive gastrointestinal diagnosis and therapyAlexander CochranEngineering and Physical Sciences Research Council (EPSRC)EP/K034537/2ENG - ENGINEERING SYSTEMS POWER & ENERGY

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