Tab. 2.

ACR TI-RADS classification – ultrasound features and their score values

Ultrasound features	Ultrasound scoring characteristics Details of US characteristic with point values
Morphology	cystic = 0
	spongiform = 0
	mixed cystix and solid = 1
	solid = 2
	indeterminate = 2
Echogenicity	anechogenic = 0
	isoechogenic = 1
	hyperechogenic = 1
	heterogeneous = 1
	hypoechogenic = 2
	deeply hypoechogenic = 3
Shape	wider than tall = 0
	taller and wide = 3
Margins/borders	smooth = 0
	ill-defined = 0
	cannot be determined = 0
	lobulated or irregular = 2
	extra-thyroidal extension = 3
Hyperechogenic	none = 0
areas	comet tail artefacts = 0
	macrocalcifications = 1
	peripheral (rim) calcifications = 2
	punctate echogenic foci (microcalcifications) = 3