Table 1.

Breast density and BI-RADS classifications of phantom combinations used in this manuscript.

	Fibroglandular Shell	Fibroglandular Volume	BI-RADS Classification
Small Adipose Shell (A1)	F1	4.4%	Class II
	F3	19.9%	Class III
	F4	37.2%	Class IV
Medium Adipose Shell (A2)	F1	1.8%	Class I
	F3	8.1%	Class II
	F4	15.0%	Class III
	F5	38.2%	Class IV
Large Adipose Shell (A3)	F2	2.7%	Class I
	F4	9.8%	Class II