; -438 bid, : The DE is obtained ree rem is the unit of Dose Equivalent (pe), ey multiplying the absorbed dose in rad by modifying factors to correct for these observed differences in the magnitude As a consequence, the magnitude of the TF ‘of the effect. Ture oO ry eltect will be the same for a given DE regardless of the B. the radiation or the manner of radiation. Mocdiivine factors . yatiation. ctor (QF) which accounts wwe ne eee le re a The 0 i it] - ¢ Q tu GS qi 18; » i yu At the oresent time, two modifying factors are emoloyed. for differences ocical effects among various forms of other is the Distribution Factor (DF) tt wiicsh actounts for the modification of the biological effects é , when a radionuclide is nonuniformly distributed in an organ. the DE for X-ray to bone tissue is ceternined “ay Or axanple, Getermined =v =l,wnile that for Pu-239 in the bone is using a QF=10 (to account for the greater iiectiveness sf alcna particl2 irradiation) - . . - . , 2 and a DF=5 ; (22 account Zor the sceculiar distribution of Pu in the bone) 19 . = [==50 rem from X-rays or Pu-239 would thus incuce the same mamser of cancers in bone but the absorbed dose from the X-reys ° et + (14 be 350 vad while that From Pu-239 would be only 1 rad.