Optimization of m

	Simulation		Radiologist Rating
	Min. Optimal m^{^a}	Max. Optimal m^{^b}	Optimal m (Min^{^c},Max^{^d})
Single-echo
Linear	4	17	6 (4,7)
Nonlinear	11	>60	35 (20,35)
Postaverage
Linear	3	15	7 (5,10)
Nonlinear	14	>60	35 (25,45)
Frequency-based
Linear	3	15	5 (2,7)
Nonlinear	8	>60	25 (20,40)

↵a,b Minimal, maximal values, respectively, of m that yield maximal contrast-to-noise ratio for any frequency of vein simulated.
↵c,d Minimal, maximal values, respectively, assigned by any of the 3 raters.