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Medical-grade Sterilizable Target for Fluid-immersed Fetoscope Optical Distortion Calibration

Nikitichev, DI; Shakir, DI; Chadebecq, F; Tella, M; Deprest, J; Stoyanov, D; Ourselin, S; (2017) Medical-grade Sterilizable Target for Fluid-immersed Fetoscope Optical Distortion Calibration. Journal of Visualized Experiments , 120 , Article e55298. 10.3791/55298. Green open access

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Abstract

We have developed a calibration target for use with fluid-immersed endoscopes within the context of the GIFT-Surg (Guided Instrumentation for Fetal Therapy and Surgery) project. One of the aims of this project is to engineer novel, real-time image processing methods for intra-operative use in the treatment of congenital birth defects, such as spina bifida and the twin-to-twin transfusion syndrome. The developed target allows for the sterility-preserving optical distortion calibration of endoscopes within a few minutes. Good optical distortion calibration and compensation are important for mitigating undesirable effects like radial distortions, which not only hamper accurate imaging using existing endoscopic technology during fetal surgery, but also make acquired images less suitable for potentially very useful image computing applications, like real-time mosaicing. In this paper proposes a novel fabrication method to create an affordable, sterilizable calibration target suitable for use in a clinical setup. This method involves etching a calibration pattern by laser cutting a sandblasted stainless steel sheet. This target was validated using the camera calibration module provided by OpenCV, a state-of-the-art software library popular in the computer vision community.

Type: Article
Title: Medical-grade Sterilizable Target for Fluid-immersed Fetoscope Optical Distortion Calibration
Open access status: An open access version is available from UCL Discovery
DOI: 10.3791/55298
Publisher version: https://doi.org/10.3791/55298
Language: English
Additional information: Copyright © 2017 Creative Commons Attribution 3.0 License.
UCL classification: UCL > Provost and Vice Provost Offices
UCL > Provost and Vice Provost Offices > UCL BEAMS
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science > Dept of Computer Science
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science > Dept of Med Phys and Biomedical Eng
URI: http://discovery.ucl.ac.uk/id/eprint/1536310
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