t1 relaxation time at 90 mhz , measured in tumors removed from nude mice 24 hr after injection of gd x dtpa-mab 19-9 ( gd , 20 mumol/kg ; 16 dtpa molecules per mab molecule ) , was significantly decreased ( by 15 % ) as compared with the control group .
C0027651
tumors
C0013254
dtpa