UCL Discovery
UCL home » Library Services » Electronic resources » UCL Discovery

Practical Dry Calibration With Medium Adaptation For Fluid-Immersed Endoscopy

Chadebecq, F; Vercauteren, T; Wimalasundera, R; Attilakos, G; David, AL; Deprest, J; Ourselin, S; (2015) Practical Dry Calibration With Medium Adaptation For Fluid-Immersed Endoscopy. Presented at: Hamlyn Symposium on Medical Robotics, London. (In press). Green open access

[img] Text
HS_2015.pdf
Access restricted to UCL open access staff
Available under License : See the attached licence file.

Download (2MB)

Abstract

A few endoscopic procedures are performed with a fluid-immersed endoscope. Fetoscopy is one such minimally invasive procedure which allows observation and intervention within the amniotic sac during pregnancy. The fetoscope is inserted through the uterus and is immersed in amniotic fluid. Fluid has a strong influence on the image formation process due to refraction at the interface of the fetoscopic lens which is determined by the optical properties of the amniotic medium. Accurate calibration is critical to vision-based methods for providing image-guided surgery and real-time information from the surgical site [1]. It consists of recording images of a calibration target of known geometric pattern in order to estimate optical properties of a camera. In the case of a fetoscope, calibration should be realised in the amniotic fluid which cannot be practically realised. A fluid-immersed pre-intervention calibration is also impractical for sterilisation purposes. Few computer vision methods address this issue and most of them are not adapted to the wide field of view as well as the severe distortion effect of a fetoscope. We experimentally show a direct link between dry and fluid-immersed camera parameters which can compensate for the optical properties of bodily or amniotic fluid as well as radial distortion effects.

Type: Conference item (UNSPECIFIED)
Title: Practical Dry Calibration With Medium Adaptation For Fluid-Immersed Endoscopy
Event: Hamlyn Symposium on Medical Robotics
Location: London
Dates: 20 June 2015 - 23 May 2015
Open access status: An open access version is available from UCL Discovery
Language: English
UCL classification: UCL
UCL > Provost and Vice Provost Offices
UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences
UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences > Faculty of Population Health Sciences
UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences > Faculty of Population Health Sciences > UCL EGA Institute for Womens Health
UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences > Faculty of Population Health Sciences > UCL EGA Institute for Womens Health > Maternal and Fetal Medicine
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: https://discovery.ucl.ac.uk/id/eprint/1468902
Downloads since deposit
1Download
Download activity - last month
Download activity - last 12 months
Downloads by country - last 12 months

Archive Staff Only

View Item View Item