title: Adaptable image cuts for motility inspection using WCE.
abstract: The Wireless Capsule Endoscopy (WCE) technology allows the visualization of the whole small intestine tract. Since the capsule is freely moving, mainly by the means of peristalsis, the data acquired during the study gives a lot of information about the intestinal motility. However, due to: (1) huge amount of frames, (2) complex intestinal scene appearance and (3) intestinal dynamics that make difficult the visualization of the small intestine physiological phenomena, the analysis of the WCE data requires computer-aided systems to speed up the analysis. In this paper, we propose an efficient algorithm for building a novel representation of the WCE video data, optimal for motility analysis and inspection. The algorithm transforms the 3D video data into 2D longitudinal view by choosing the most informative, from the intestinal motility point of view, part of each frame. This step maximizes the lumen visibility in its longitudinal extension. The task of finding "the best longitudinal view" has been defined as a cost function optimization problem which global minimum is obtained by using Dynamic Programming. Validation on both synthetic data and WCE data shows that the adaptive longitudinal view is a good alternative to the traditional motility analysis done by video analysis. The proposed novel data representation a new, holistic insight into the small intestine motility, allowing to easily define and analyze motility events that are difficult to spot by analyzing WCE video. Moreover, the visual inspection of small intestine motility is 4 times faster then by means of video skimming of the WCE.
authors.affiliation: Department Matemàtica Aplicada i Anàlisis, Universitat de Barcelona, Barcelona, Spain. michal.drozdzal@ub.edu
authors.forename: Michal
authors.initials: M
authors.lastname: Drozdzal
authors.forename: Santi
authors.initials: S
authors.lastname: Seguí
authors.forename: Jordi
authors.initials: J
authors.lastname: Vitrià
authors.forename: Carolina
authors.initials: C
authors.lastname: Malagelada
authors.forename: Fernando
authors.initials: F
authors.lastname: Azpiroz
authors.forename: Petia
authors.initials: P
authors.lastname: Radeva
mesh_terms: D000465:Algorithms; D053704:Capsule Endoscopy; D005769:Gastrointestinal Motility; D006801:Humans; D007089:Image Enhancement / Q000379:methods*; D007091:Image Processing, Computer-Assisted / Q000379:methods*; D021621:Imaging, Three-Dimensional; D007421:Intestine, Small; D014741:Video Recording