Table 4.

Adjusted BI-RADS Grading Standard

BI-RADS Category	SWE-The stiff rim Sign	CEUS-Independent Variables	Adjusted BI-RADS Category
4A	Yes	≥2	4B
	Yes	<2	4A
	No	≥2	4A
	No	<2	3
4B	Yes	≥2	4C
	Yes	<2	4B
	No	≥2	4B
	No	<2	4A
4C	Yes	≥2	5
	Yes	<2	4C
	No	≥2	4C
	No	<2	4B

Abbreviations: BI-RADS, Breast imaging reporting and data system; SWE, Shear wave elastography; CEUS, Contrast-enhanced ultrasound.