▁Places ▁in ▁ 2 0 0 8 . ▁ ▁References ▁ ▁Category : Ind ust rial ▁buildings ▁completed ▁in ▁ 1 9 0 5 ▁Category : Red ▁Oak , ▁Iowa ▁Category : Build ings ▁and ▁structures ▁in ▁Mont gom ery ▁County , ▁Iowa ▁Category : National ▁Register ▁of ▁Historic ▁Places ▁in ▁Mont gom ery ▁County , ▁Iowa ▁Category : Ind ust rial ▁buildings ▁and ▁structures ▁on ▁the ▁National ▁Register ▁of ▁Historic ▁Places ▁in ▁Iowa <0x0A> </s> ▁Fl u ores c ence ▁gu ided ▁surg ery ▁( F GS ), ▁( also ▁called ▁' F lu ores c ence ▁image - gu ided ▁surg ery ', ▁or ▁in ▁the ▁specific ▁case ▁of ▁tum or ▁res ection , ▁' flu ores c ence ▁gu ided ▁res ection ') ▁is ▁a ▁medical ▁imag ing ▁technique ▁used ▁to ▁detect ▁flu ores cent ly ▁label led ▁structures ▁during ▁surg ery . ▁Similarly ▁to ▁standard ▁image - gu ided ▁surg ery , ▁F GS ▁has ▁the ▁purpose ▁of ▁gu iding ▁the ▁surg ical ▁procedure ▁and ▁providing ▁the ▁sur geon ▁of ▁real ▁time ▁visual ization ▁of ▁the ▁operating ▁field . ▁When ▁compared ▁to ▁other ▁medical ▁imag ing ▁modal ities , ▁F GS ▁is ▁che aper ▁and ▁superior ▁in ▁terms ▁of ▁resolution ▁and ▁number ▁of ▁mole cules ▁detect able . ▁As ▁a ▁draw back , ▁pen etr ation ▁depth ▁is ▁usually ▁very ▁poor ▁( 1 0 0 ▁ μ m ) ▁in ▁the ▁visible ▁w avel ength s , ▁but ▁it ▁can ▁reach ▁up ▁to ▁ 1 – 2   cm