A Definition and a Formalization of Conservative Adaptation for Knowledge-Intensive Case-Based Reasoning Application to Decision Support in Oncology (A Preliminary Report)

Jean Lieber 1
1 ORPAILLEUR - Knowledge representation, reasonning
INRIA Lorraine, LORIA - Laboratoire Lorrain de Recherche en Informatique et ses Applications
Abstract : Case-based reasoning aims at solving a problem by the adaptation of the solution of an already solved problem that has been retrieved in a case base. This paper defines an approach to adaptation called conservative adaptation; it consists in keeping as much as possible from the solution to be adapted, while being consistent with the domain knowledge. This idea can be related to the theory of revision: the revision of an old knowledge base by a new one consists in making a minimal change on the former, while being consistent with the latter. This leads to a formalization of conservative adaptation based on a revision operator in propositional logic. Then, this theory of conservative adaptation is confronted to an application of case-based decision support to oncology: a problem of this application is the description of a patient ill with breast cancer, and a solution, the therapeutic recommendation for this patient. Examples of adaptations that have actually been performed by experts and that can be captured by conservative adaptation are presented. These examples show a way of adapting contraindicated treatment recommendations, treatment recommendations that cannot be applied, and recommendations of ineffective treatments. Finally, several related issues are studied, in particular, the issue of a retrieval process well-suited for conservative adaptation and the issue of case combination following a multiple case retrieval.
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Jean Lieber. A Definition and a Formalization of Conservative Adaptation for Knowledge-Intensive Case-Based Reasoning Application to Decision Support in Oncology (A Preliminary Report). [Research Report] 2006, pp.27. ⟨inria-00118757⟩

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