For an administered activity of 2 590 MBq, the typical radiation dose to the target organ, skeletal metastases, is 86.5 Gy and the typical radiation doses to the critical organs are: normal bone surfaces 17.5 Gy, red marrow 4.0 Gy, urinary bladder wall 2.5 Gy, kidneys 0.047 Gy and ovaries 0.021 Gy.