York University at TREC 2011: Medical Records Track

In this paper, we present our participation in the Medical Records Track of TREC 2012. This is the second time we take part in this track. 50 new topics have been published in this year. The goal of this track is still to nd relevant patients that have particular diseases and/or treatments. To achieve this goal, we try four methods which include popular techniques like query expansion, concept recognition and so on. Four runs have been submitted and they are based on our previous work. Detailed discussion has been made to show the eectiveness of dierent techniques on the Medical Records dataset.

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