title: Modeling and segmentation of surgical workflow from laparoscopic video.
abstract: Modeling and analyzing surgeries based on signals that are obtained automatically from the operating room (OR) is a field of recent interest. It can be valuable for analyzing and understanding surgical workflow, for skills evaluation and developing context-aware ORs. In minimally invasive surgery, laparoscopic video is easy to record but it is challenging to extract meaningful information from it. We propose a method that uses additional information about tool usage to perform a dimensionality reduction on image features. Using Canonical Correlation Analysis (CCA) a projection of a high-dimensional image feature space to a low dimensional space is obtained such that semantic information is extracted from the video. To model a surgery based on the signals in the reduced feature space two different statistical models are compared. The capability of segmenting a new surgery into phases only based on the video is evaluated. Dynamic Time Warping which strongly depends on the temporal order in combination with CCA shows the best results.
authors.affiliation: Computer Aided Medical Procedures, Technische Universitiät München, Germany.
authors.forename: Tobias
authors.initials: T
authors.lastname: Blum
authors.forename: Hubertus
authors.initials: H
authors.lastname: Feussner
authors.forename: Nassir
authors.initials: N
authors.lastname: Navab
mesh_terms: D003198:Computer Simulation; D005858:Germany; D007090:Image Interpretation, Computer-Assisted / Q000379:methods*; D010535:Laparoscopy / Q000379:methods*; D008962:Models, Theoretical; D011361:Professional Competence; D013647:Task Performance and Analysis; D014741:Video Recording / Q000379:methods*; D057188:Workflow