Table 2:

ROC analysis of multiparametric MR perfusion for differentiation of PTA from cervical lymph nodes and thyroid gland

	PTA vs Lymph Node				PTA vs Thyroid Gland
	AUC	Threshold	Sensitivity	Specificity	AUC	Threshold	Sensitivity	Specificity
Peak enhancement	0.62	>340	65%	64%	0.94	>270	83%	93%
Time-to-peak (seconds)	0.77	<49	66%	71%	0.62	<37	86%	48%
Wash-in	0.84	>5.52	72%	89%	0.87	>5.27	76%	90%
Washout	0.68	>0.62	76%	64%	0.88	>0.63	76%	86%