Radioactive agents have applications in imaging and delivery of radiations, depending on {HEAD ~ the specific element} included in {TAIL ~ the active agent} 
included in
Radioactive agents have applications in imaging and delivery of radiations , depending on { HEAD ~ the specific element } included in { TAIL ~ the active agent }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL