Integration of DCE-MRI and DW-MRI Quantitative Parameters for Breast Lesion Classification

Table 2

Summary of DCE and DW features.

ID	Symbol	Description	Units
1		Perfusion fraction	—
2		Pseudodiffusion coefficient	mm^2 s^−1
3		Tissue diffusion coefficient	mm^2 s^−1
4	WOS/WIS	Ratio between slopes of wash-out and wash-in phase (see below)	—
5	WOI/WII	Ratio between intercepts of wash-out and wash-in phase (see below)	—
6	AUCWI	Area under gadolinium curve in the wash-in phase	s mmol L^−1
7	AUCWO	Area under gadolinium curve in the wash-out phase	s mmol L^−1
8	AUCWI/AUCWO	Ratio between areas of wash-out and wash-in phase	—
9	HR	Height ratio	—
10	TTP	Time to peak	s
11	MSD	Maximum signal difference	—
12	AUC	Area under curve	—
13	SB	Basal signal	—
14	WIS	Wash-in slope	s^−1
15	WII	Wash-in intercept	—
16	WOS	Wash-out slope	s^−1
17	WOI	Wash-out intercept	—
18	VES	Variance of enhancement slope	s^−1
19	PI	Perfusion Index	—
20	SOD	Sum of intensity difference	—
21		Volume transfer constant from plasma to extracellular-extravascular space	s^−1
22		Diffusion rate constant from extracellular-extravascular space to plasma	s^−1
23		Plasma volume fraction	—