r TABLE 4 RADIOACTIVE EQUILIBRIUM BETWEEN RaD AND Raf IN HUMAN BONE in vivo Sample No. 115 131 135 140 186 245 Ratio RaF/RaDd Hiac Crest 0.81 0.77 0.79 1.00 1.43 1.7 * Rib- Vertebra Joint Rib Rib 1040.2 Ret TINEIIEay Average Type of Tissue elena, Setepattieeea Re Oo ' ve * € L : a ? ~