Video based assessment of OSATS using sequential motion textures

Yachna Sharma, Vinay Bettadapura, Thomas Plotz, Nils Hammerla, Sebastian Mellor, Roisin McNaney, Patrick Olivier, Sandeep Deshmukh, Andrew McCaskie, Irfan Essa

Research output: Chapter in Book/Report/Conference proceedingConference PaperResearch


We present a fully automated framework for video based surgical skill assessment that incorporates the sequential and qualitative aspects of surgical motion in a data-driven manner. We replicate Objective Structured Assessment of Technical Skills (OSATS) assessments, which provides both an overall and in-detail evaluation of basic suturing skills required for surgeons. Video analysis techniques are introduced that incorporate sequential motion aspects into motion textures. We also demonstrate significant performance improvements over standard bag-of-words and motion analysis approaches. We evaluate our framework in a case study that involved medical students with varying levels of expertise performing basic surgical tasks in a surgical training lab setting.
Original languageEnglish
Title of host publicationFifth Workshop on Modeling and Monitoring of Computer Assisted Interventions
EditorsGermain Forestier, Stamatia Giannarou, Henry Lin, Ken Masamune, Stefanie Speidel, Ralf Stauder, Cedric Penet
Place of PublicationCham Switzerland
Number of pages10
Publication statusPublished - 2014
Externally publishedYes
EventWorkshop on Modeling and Monitoring of Computer Assisted Interventions 2014 - Boston , United States of America
Duration: 14 Sep 201414 Sep 2014
Conference number: 5th (Website (proceedings created from website))


ConferenceWorkshop on Modeling and Monitoring of Computer Assisted Interventions 2014
Abbreviated titleM2CAI
CountryUnited States of America
Internet address


  • Surgical skill assessment
  • motion texture
  • bag-of-words

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