However, it will be understood that other chelators for these ions are also comprehended by the present invention because such other chelators can be readily incorporated into {HEAD ~ molecules} according to {TAIL ~ the present invention} using the same chemistry as used to incorporate DTPA derivatives 
However , it will be understood that other chelators for these ions are also comprehended by the present invention because such other chelators can be readily incorporated into { HEAD ~ molecules } according to { TAIL ~ the present invention } using the same chemistry as used to incorporate DTPA derivatives
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH