TI-RADS 3

TI-RADS 4

TI-RADS 5

Total nodules

Sensitivity

100

91.7

100

96.4%

Specificity

46.4

38.4

10

40.7%

PPV (precision)

2.2

19.6

62.5

21.4%

NPV

100

96.6

100

98.6%

Accuracy

47.1

45.9

64

48.7%