IRIT at TREC 2011: Evaluation of Query Expansion Techniques for Medical Record Retrieval

In TREC 2011, we are motivated to participate in the medical record retrieval task, namely TRECMed. Our research focused on the evaluation of term weighting models and query expansion techniques within the medical record retrieval task. We compared the performance of different state-of-the-art term weighting models for retrieving patient records that might best suit the clinical information need. Afterwards, we evaluate different state-of-the-art query expansion (QE) techniques within an IR framework. We describe the IR system architecture and how we carried out the TREC experiments, and we present effectiveness results.