A Global Approach for Automatic Fibroscopic Video Mosaicing in Minimally Invasive Diagnosis

Authors:
Selen Atasoy;David P. Noonan;Selim Benhimane;Nassir Navab;Guang-Zhong Yang
Affiliations:
Department of Computing, Imperial College London, , and Chair for Computer Aided Medical Procedures (CAMP), Technische Universität München,;Institute of Biomedical Engineering, Imperial College London, ,;Chair for Computer Aided Medical Procedures (CAMP), Technische Universität München,;Chair for Computer Aided Medical Procedures (CAMP), Technische Universität München,;Department of Computing, Imperial College London, , and Institute of Biomedical Engineering, Imperial College London, ,
Venue:
MICCAI '08 Proceedings of the 11th international conference on Medical Image Computing and Computer-Assisted Intervention - Part I
Year:
2008

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Abstract

Recent developments in bio-photonics have called for the need of bringing cellular and molecular imaging modalities to an in vivo --- in situ setting to allow for real-time tissue characterization and functional assessment. Before such techniques can be used effectively in routine clinical environments, it is necessary to address the visualization requirement for linking point based optical biopsy to large area tissue visualization. This paper presents a novel approach for fibered endoscopic video mosaicing that permits wide region tissue visualization. A feature-based registration method is used to register the frames of the endoscopic video sequence by taking into account the characteristics of fibroscopic imaging such as non-linear lens distortion and high-frequency fiber optic facet pattern. The registration is combined with an efficient optimization scheme in order to align all input frames in a globally consistent way. An evaluation on phantom and ex vivotissue images allowing free-hand camera motion is presented.