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In-Vivo Evaluation of Microultrasound and Thermometric Capsule Endoscopes

Lay, H, Cummins, G, Cox, BF, Qiu, Y, Turcanu, MV, McPhillips, R, Connor, C, Gregson, R, Clutton, E, Desmulliez, MPY and Cochran, S (2018) In-Vivo Evaluation of Microultrasound and Thermometric Capsule Endoscopes. IEEE Transactions on Biomedical Engineering. ISSN 0018-9294

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Abstract

Clinical endoscopy and colonoscopy are commonly used to investigate and diagnose disorders in the upper gastrointestinal tract and colon respectively. However, examination of the anatomically remote small bowel with conventional endoscopy is challenging. This and advances in miniaturization led to the development of video capsule endoscopy (VCE) to allow small bowel examination in a non-invasive manner. Available since 2001, current capsule endoscopes are limited to viewing the mucosal surface only due to their reliance on optical imaging. To overcome this limitation with submucosal imaging, work is under way to implement microultrasound (μUS) imaging in the same form as VCE devices. This paper describes two prototype capsules, termed Sonocap and Thermocap, which were developed respectively to assess the quality of μUS imaging and the maximum power consumption that can be tolerated for such a system. The capsules were tested in vivo in the oesophagus and small bowel of porcine models. Results are presented in the form of μUS B-scans and safe temperature readings observed up to 100 mW in both biological regions. These results demonstrate that acoustic coupling and μUS imaging can be achieved in vivo in the lumen of the bowel and the maximum power consumption that is possible for miniature μUS systems.

Item Type: Article
Uncontrolled Keywords: 0903 Biomedical Engineering, 0906 Electrical And Electronic Engineering, 0801 Artificial Intelligence And Image Processing
Subjects: R Medicine > R Medicine (General)
T Technology > TK Electrical engineering. Electronics. Nuclear engineering
Divisions: Electronics and Electrical Engineering
Publisher: IEEE
Date Deposited: 03 Aug 2018 11:02
Last Modified: 12 Oct 2018 19:54
DOI or Identification number: 10.1109/TBME.2018.2852715
URI: http://researchonline.ljmu.ac.uk/id/eprint/9057

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