TY - JOUR
T1 - Accounting for the temporal dimension in case-based retrieval
T2 - A framework for medical applications
AU - Montani, Stefania
AU - Portinale, Luigi
PY - 2006/8
Y1 - 2006/8
N2 - Time-varying information embedded in cases has often been neglected and its role oversimplified in case-based reasoning systems. In several real-world problems, and in particular in medical applications, a case should capture the evolution of the observed phenomenon over time. To this end, we propose to represent temporal information at two levels: (1) at the case level, when some features are collected in the form of time series, because they describe parameters varying within a period of time (which corresponds to the case duration), and we aim at analyzing the system behavior within the case duration interval itself; (2) at the history level, when we are interested in reconstructing the evolution of the system by retrieving temporally related cases. In this paper, we describe a framework for case representation and retrieval that is able to take into account the temporal dimension, and is meant to be used in any time dependent domain, which is particularly well suited for medical applications. To support case retrieval, we provide an analysis of similarity-based time series retrieval techniques; to support history retrieval, we introduce possible ways to summarize the case content, together with the corresponding strategies for identifying similar instances in the knowledge base. A concrete application of our framework is represented by RHENE, a system for intelligent retrieval in the hemodialysis domain.
AB - Time-varying information embedded in cases has often been neglected and its role oversimplified in case-based reasoning systems. In several real-world problems, and in particular in medical applications, a case should capture the evolution of the observed phenomenon over time. To this end, we propose to represent temporal information at two levels: (1) at the case level, when some features are collected in the form of time series, because they describe parameters varying within a period of time (which corresponds to the case duration), and we aim at analyzing the system behavior within the case duration interval itself; (2) at the history level, when we are interested in reconstructing the evolution of the system by retrieving temporally related cases. In this paper, we describe a framework for case representation and retrieval that is able to take into account the temporal dimension, and is meant to be used in any time dependent domain, which is particularly well suited for medical applications. To support case retrieval, we provide an analysis of similarity-based time series retrieval techniques; to support history retrieval, we introduce possible ways to summarize the case content, together with the corresponding strategies for identifying similar instances in the knowledge base. A concrete application of our framework is represented by RHENE, a system for intelligent retrieval in the hemodialysis domain.
KW - Medical applications of CBR
KW - Temporal CBR architecture
KW - Time series retrieval
UR - http://www.scopus.com/inward/record.url?scp=33750713347&partnerID=8YFLogxK
U2 - 10.1111/j.1467-8640.2006.00284.x
DO - 10.1111/j.1467-8640.2006.00284.x
M3 - Article
SN - 0824-7935
VL - 22
SP - 208
EP - 223
JO - Computational Intelligence
JF - Computational Intelligence
IS - 3-4
ER -