RALI-OLST Weekly Talks

Towards Concept-based Medical Information Retrieval Using Domain Knowledge

Xiao Jie (James) Liu (liuswear <at> gmail (point) com)


Wednesday 29 April 2015 at 11:30 AM

Salle 3195, Pavillon André-Aisenstadt

Although rich knowledge resources (e.g. UMLS) exist in biomedical area, their use in medical information retrieval have only produced moderate success. Previous attempts have tried to recognize concepts from documents and queries using these resources and have performed concept-based IR, but this approach often led to degradations in retrieval effectiveness. We believe that the situation is not only due to the difficulty of identifying concepts from texts, but also to the simplistic use of concepts. In this presentation, we propose a method for medical IR taking into account both the inherent query structure and the semantic structure between concepts. Our preliminary experiments with query structure have shown promising results. We expect to gain in retrieval precision by considering semantic relations between concepts.

Présentation de sujet de thèse

Jury: Guy Lapalme (président), Jian-Yun Nie (directeur), François Major (membre)

Follow this link to subscribe to future RALI-OLST announcements.

See all the weekly talks for the year:

1991 1992 1993 1994 1995 1997 1998 1999 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009 2010 2011 2012 2013 2014 2015 2016 2017 2018 2019 2020 2021 2022 2023 2024