in developing new brain perfusion imaging agents , three types of neutral and lipid-soluble technetium 99m complexes have been reported : 99mtc-ethylene cysteinate dimer , 99mtc-hexamethyl propylene amine oxime , and 99mtc-boric acid adduct of technetium oxime .
C0303611
technetium 99m
C0039411
technetium