Guo D, Lincoln M J, Haug P J, Turner C W, Warner H R
Department of Medical Informatics, University of Utah, Salt Lake City.
Proc Annu Symp Comput Appl Med Care. 1992:465-9.
Iliad is a diagnostic expert system for internal medicine. Iliad's "best information" mode is used to determine the most cost-effective findings to pursue next at any stage of a work-up. The "best information" algorithm combines an information content calculation together with a cost factor. The calculations then provide a rank-ordering of the alternative patient findings according to cost-effectiveness. The authors evaluated five information content models under two different strategies. The first, the single-frame strategy, considers findings only within the context of each individual disease frame. The second, the across-frame strategy, considers the information that a single finding could provide across several diseases. The study found that (1) a version of Shannon's information model performed the best under both strategies---this finding confirms the result of a previous independent study, (2) the across-frame strategy was preferred over the single-frame strategy.
伊利亚德是一个用于内科的诊断专家系统。伊利亚德的“最佳信息”模式用于确定在检查的任何阶段接下来要进行的最具成本效益的检查项目。“最佳信息”算法将信息含量计算与成本因素结合在一起。然后，这些计算根据成本效益对患者的各项检查结果进行排序。作者在两种不同策略下评估了五种信息含量模型。第一种是单框架策略，仅在每种单独疾病框架的背景下考虑检查结果。第二种是跨框架策略，考虑单个检查结果可能为多种疾病提供的信息。研究发现：（1）香农信息模型的一个版本在两种策略下表现最佳——这一发现证实了之前一项独立研究的结果；（2）跨框架策略优于单框架策略。
