. ▁ ▁See ▁also ▁Body ▁modification ▁ ▁References ▁ ▁Body ▁Mod ification ▁E - z ine ▁Publish er ' s ▁Ring ▁article ▁on ▁Jew el E ye ▁M elles ▁GR J , ▁Ver vers ▁B , ▁van ▁der ▁L inden ▁J W : ▁Cos met ic ▁Ext ra oc ular ▁Im plant . ▁J ▁Cat ar act ▁Ref ract ▁S urg ▁ 2 0 0 4 ; 3 0 : 1 5 9 5 ▁- ▁Sch olar ly ▁Journal ▁Article ▁ ▁External ▁links ▁N II OS ▁website ▁ ▁Category : Body ▁art ▁Category : Types ▁of ▁j ew ell ery ▁Category : Body ▁modification <0x0A> </s> ▁Pe pt ide ▁re ceptor ▁rad ion uclide ▁ther apy ▁( PR RT ) ▁is ▁a ▁type ▁of ▁un se aled ▁source ▁radi other apy , ▁using ▁a ▁radi oph arma ce ut ical ▁which ▁targets ▁pe pt ide ▁re cept ors ▁to ▁deliver ▁local ised ▁treatment , ▁typically ▁for ▁ne uro end ocr ine ▁tum ours ▁( NET s ). ▁ ▁Mechan ism ▁A ▁key ▁advantage ▁of ▁PR RT ▁over ▁other ▁methods ▁of ▁radi other apy ▁is ▁the ▁ability ▁to ▁target ▁delivery ▁of ▁th era pe ut ic ▁rad ion u cl ides ▁directly ▁to ▁the ▁tum our ▁or ▁target ▁site . ▁This ▁works ▁because ▁some ▁tum ours ▁have ▁an ▁abund ance ▁( over expression ) ▁of ▁pe pt ide ▁re cept ors , ▁compared ▁to ▁normal ▁t issue . ▁A ▁radio active ▁subst ance ▁can ▁be ▁combined ▁with ▁a ▁relevant ▁pe pt ide ▁( or