Table 4.

Overview entity classes.

	Concept	Description	Example
Central	Medical_condition	Pathologic findings of disease value or findings of uncertain disease value	“akute sinusitis frontalis”, “Ausweitung e vacuo”, “Kalzifizierung”
	Anatomical_entity	Anatomical terms	“Gehirnschädel”, “Ventrikel”
	Imaging_observation	Objective radiological descriptions	“Ausweitung”, “Raumforderung”
	Diaglab_procedure	Imaging modalities, but also preliminary examinations, or clinical examinations outside of radiology	“CT”, “EKG”
	Non_anatomical_substance	Drugs, noxious agents, or other biologically active substances	“Kontrastmittel”, “Marcumar”, “Gadolinium”
	Procedure	Terms for interventions such as surgical procedures or radiation treatments	“Bohrlochtrepanation”
	Medical_device	Medical devices and materials	“Clips”, “Ventrikelsonde”
	Follow_Up	Recommendations or statements on follow-up investigations	“Kontrolluntersuchung empfohlen”, “Follow-up Untersuchung”
	Prior_investigation	Preliminary examination carried out	“Voruntersuchung”, “VU”, “MRT-Voruntersuchung”
Descriptors	Location_descriptor	Terms with spatial information, also anatomical-spatial words	“frontal”, “links”, “beidseits”
	Certainty_descriptor	Negations and speculations as well as information about the degree of certainty of findings or diagnoses	“kein”, “wahrscheinlich”, “deutlich”
	Quality_descriptor	Term about the assessability of imaging (usually in combination of an artifact)	“eingeschränkte Beurteilbarkeit”
	Radlex_descriptor	Terms that describe other entities in more detail and cannot be assigned to any other descriptor	“hypodens”, “inhomogen”, “klein”
Specifications	Dosing	The dosage of medical or non-medical substances and the radiation dose	“400 MG J/ML - 200 ML, 50.00 ml”
	State_of_health	Terms describing norm variants or normal findings.	“altersgerecht”, “frei”, “unauffällig”
	Measurement	Measurement of a parameter with following unit or dimensionless (no dosages)	“8 cm”, “30 min”, “Segment IV”
	Time_information	Terms with temporal information (no dynamic temporal changes)	“akut”, “rezent”, “vor 2 Tagen”
	Dynamism	Descriptions of dynamic changes	“neu”, progredient”, “vorbekannt”
	Property	Property or function terminology	“Durchmesser”, “Belüftung”
	Score_Grade_Type	Terms of classification, categorization, medical scores, graduations, variations, and typifications	“ASPECTS”, “geringgradig”, “Typ 2”