Table 3.

Select group of trial formulaic ratio images. ($\mathrm{F}440\mathrm{red}$ refers to an AF image excited at 440 nm with emission collected from 600 to 655 nm.)

$\mathrm{R}7=\frac{1}{\mathrm{F}440*\mathrm{F}320}$	$\mathrm{R}24=\frac{1}{\mathrm{R}555+\mathrm{F}440}$
$\mathrm{R}10=\frac{1}{\mathrm{F}440}$	$\mathrm{R}25=\frac{1}{\mathrm{R}555*\mathrm{F}440}$
$\mathrm{R}15=\frac{\mathrm{F}340}{\mathrm{F}340+\mathrm{F}440}$	$\mathrm{R}27=\frac{\mathrm{F}340}{\mathrm{F}440}$
$\mathrm{R}20=\frac{1}{\mathrm{R}555}$	$\mathrm{R}30=\frac{\mathrm{R}480}{\mathrm{R}555}$
$\mathrm{R}23=\frac{1}{\mathrm{F}440\mathrm{red}+\mathrm{F}440}$