Accession Number : AD1004827

Title :   TUW @ TREC Clinical Decision Support Track 2015

Descriptive Note : Conference Paper

Corporate Author : Vienna University of Technology Vienna Austria

Personal Author(s) : Palotti,Joao ; Hanbury,Allan

Full Text :

Report Date : 20 Nov 2015

Pagination or Media Count : 9

Abstract : In this document, we describe the participation of Vienna University of Technology (TUW in German) in both tasks A and B of the TREC Clinical Decision Support (TREC-CDS) Track 2015. Based on the 2014 data, we concluded that query expansion with PRF resulted in large improvements over a BM25 baseline. Thus, we investigate a manner to add an intermediary layer based on a subset of the concepts annotated by MetaMap. This acts as a way to add weight to relevant concepts in the query and slightly expand the query with the preferred name of relevant concepts, before performing the query expansion with PRF. For TREC-CDS 2014, our method could reach a precision at 10(P@10) of 0.40, while the best result of that year was 0.39. For 2015, we could reach a P@10 of 0.41 using the intermediary layer proposed, a small improvement over our baseline of P@10 of 0.39 when using only the original query expanded with PRF.

Distribution Statement : APPROVED FOR PUBLIC RELEASE