Construction of a knowledge graph for breast cancer diagnosis based on Chinese electronic medical records: development and usability study

Table 1 The entities and attributes related to mammography features in the concept layer

Project	First-level entity	Second-level entity	Entity attributes
Breast cancer mammography	Common signs	Mass	Location, Margin, Number, Shape, Type, Size, Density, Negation,
		Calcification	Location, Number, Shape, Type, Size, Density, Negation, Distribute
		Structure	Describe
	Special signs	Duct change	Describe
		Intramammary lymph nodes	Location, Number, Shape, Negation, Describe
		Asymmetrical	Location, Describe
	Merge signs	Vascular change	Location, Shape, Negation,
		Axillary lymph nodes	Location, Number, Shape, Negation, Describe
		Association anomaly	Location, Number, Negation, Describe
	Category descriptions		Location, Describe

ISSN: 1472-6947