After {TAIL ~ a predetermined period} of time, {HEAD ~ the radiation device} is disconnected from the fixing element and removed from the body 
After { TAIL ~ a predetermined period } of time , { HEAD ~ the radiation device } is disconnected from the fixing element and removed from the body
OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH