ACR TI-RADS thyroid calculator

Adult thyroid nodule assessment. Clinical context can override routine size thresholds; category is not a diagnosis.

ACR TI-RADS 2017: composition, echogenicity of the solid component, transverse shape, margin and additive echogenic foci. Cystic / almost completely cystic and spongiform nodules score 0. FNA thresholds: TR3 25 mm, TR4 15 mm, TR5 10 mm. Ultrasound follow-up thresholds: TR3 15 mm, TR4 10 mm, TR5 5 mm. TR1 and TR2 have no routine FNA or follow-up recommendation under this system.

Tessler FN et al. ACR Thyroid Imaging, Reporting and Data System (TI-RADS): White Paper of the ACR TI-RADS Committee. J Am Coll Radiol. 2017;14:587-595. doi:10.1016/j.jacr.2017.01.046.