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Table 4 Feature weight of TIRADS

From: A novel TIRADS of US classification

Feature Weights
Feature reference weight (W i ) Malignant weight (score)
Composition
 Solid 1.6 0
 Mixed 0.2 0
 Cystic   − 2
Margins
 Ill-defined margins 3.7 3
 Microlobulated 5.5 6
Shape
 Irregular 6 6
Calcification
 Micro-calcification 6 6
 Macro-calcification 1.9 2
 No-calcification 0.4 1
Taller than wide
 <= 1 0.5 1
 > 1 6 6
Blood flow
 Messy 1.8 1
 Central 6 2
 Peripheral 0.7 0.5
 Focal 0 − 2
 No blood flow 0.4 0