Comparison of Diagnostic Performance of Three-Dimensional Positron Emission Mammography versus Whole Body Positron Emission Tomography in Breast Cancer

Table 1

Calculation of diagnostic concordance and performance of WBPET and 3D-PEM.

	WBPET+	WBPET−
3D-PEM+	A	B
3D-PEM−	C	D
	Histopathology +	Histopathology −
3D-PEM or WBPET+	a	b
3D-PEM or WBPET−	c	d

Concordance rate of positive diagnosis of 3D-PEM compared with WBPET = A/(A + C) × 100%; concordance rate of negative diagnosis of 3D-PEM compared with WBPET = D/(B + D) × 100%; overall diagnostic concordance = (A + D)/(A + B + C + D) × 100%; sensitivity = a/(a + c) × 100%; specificity = d/(b + d) × 100%; accuracy = (a + d)/(a + b + c + d) × 100%.