A plurality of {HEAD ~ segmentations} are generated for {TAIL ~ each delivery angle}, from which the IMAT treatment plan is determined 
A plurality of { HEAD ~ segmentations } are generated for { TAIL ~ each delivery angle } , from which the IMAT treatment plan is determined
OTH OTH OTH HEAD HEAD HEAD HEAD HEAD OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH