Fig. 2.

Sonographic classification of all 1029 thyroid nodules using different classification schemes. ATA 2015: benign (dark green), very low suspicion (yellow), low suspicion (light orange), intermediate suspicion (dark orange), high suspicion (red). EU-TIRADS: benign/EU-TIRADS 2 (dark green), low risk/EU-TIRADS 3 (light orange), intermediate risk/EU-TIRADS 4 (dark orange), high risk/EU-TIRADS 5 (red). ACR-TIRADS: benign/TR1 (dark green), not suspicious/TR 2 (light green), mildly suspicious/TR 3 (light orange), moderately suspicious/TR 4 (dark orange), highly suspicious/TR 5 (red)