The marrow depress effect of 153Sm-EDTMP was higher than that of 89SrC1_2.So,188Re-HEDP or 89SrC1_2 can be chosen primarily in treating bone metastasis.

• 153Sm-EDTMP的骨髓抑制作用较89SrCl2严重,临床可首选188Re-HEDP或89SrCl2。