Table 4.

Comparison of different existing solutions to calculate key metrics of radiology data (or of medical data in general in the last column).

Solution	Studies
	[6-9]	[10]	[11]	[12]	[13,14]	[15,16]
Graphical results	Yes	No	Yes	Yes	No	Yes
Graphical query definition	No	Limited	Limited	Limited	No	Yes
User-defined queries	No	Limited	Limited	Limited	Yes	Yes
Additional calculations during import	N/Aa	No	No	No	No	No
Import independent of a specific RISb	No	No	Yes	No	No	Yes

^aN/A: not applicable. Because these solutions operate directly on a radiology information system (RIS), no intermediate storage is used and therefore no additional attributes can be saved to it.

^bRIS: radiology information system.