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