Table 1.

Dataset information for the ADC Mapping CP.

Group label	Description	$N$ studies	$b$-values ($\mathrm{s}/{\mathrm{mm}}^2$)	Scanner manufacturersa	Output parametersb	Analysis ROIs
Br2b	Two $b$-value, three direction bilateral axial breast	3	0, 800	GEHC, SM, PM	${\mathrm{ADC}}_2$	Multislice tumor
Br4b	Four $b$-value, three direction bilateral axial breast	4c	0, 100, 600, 800	GEHC, SM, PM	${\mathrm{ADC}}_4$	Multislice tumor
					${\mathrm{ADC}}_{\text{slow}}$
					PerfFrac
Ph4b	Four $b$-value, three direction diffusion phantom	3	0, 500, 900, 2000	GEHC, SM, PM	${\mathrm{ADC}}_4$	1-cm-diameter circles, 13 vials
					${\mathrm{ADC}}_{\text{hi-low}}$

^aManufacturers: General Electric Healthcare (GEHC), Siemens Medical (SM), Philips Medical (PM).

^bOutput parameters: ${\mathrm{ADC}}_{⟨n⟩}$: monoexponential ADC using all $⟨n⟩$ $b$-values; ${\mathrm{ADC}}_{\text{hi-low}}$: monoexponential ADC using only highest and lowest $b$-values; ${\mathrm{ADC}}_{\text{slow}}$: monoexponential ADC using three highest $b$-values; and PerfFrac: fraction of $b=0$ signal attributed to fast-decaying perfusion component.

^cAn additional GEHC study with all directional DWI images but no trace images was included in Br4b.