. Author manuscript; available in PMC: 2011 Feb 7.

Published in final edited form as: AJR Am J Roentgenol. 2009 Oct;193(4):W295–W300. doi: 10.2214/AJR.09.2483

TABLE 5.

Comparison in Diagnostic Performance of Different Kinetic Curve Type Categories Between Qualitative and Quantitative Methods

Method	Persistently Enhancing Curve		Plateau Curve		Washout Curve

	Positive Likelihood Ratio	PPV (%)	Positive Likelihood Ratio	PPV (%)	Positive Likelihood Ratio	PPV (%)

Qualitative^a	0.20	40	1.8	86	2.7	90
Quantitative 1^b	0.09	25	1.8	86	5.4	95
Quantitative 2^c	0.13	30	0.6	67	6.1	95

Note—PPV = positive predictive value.

Average value of the readings of the three radiologists.

Categorization using 0.03%/s slope cutoff.

Categorization using 5% percentage enhancement difference cutoff.