S liver liver 4 6 10 5 rad\u00b5 Ci hr S liver kidneys 3 9 106 rad\u00b5 Ci hr The liver

# S liver liver 4 6 10 5 radµ ci hr s liver kidneys 3

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S ( liver liver ) = 4 . 6 × 10 5 rad Ci-hr S ( liver kidneys ) = 3 . 9 × 10 6 rad Ci-hr (The liver to liver S -value is slightly different than we had calculated, as MIRD 11 used slightly different decay data.) Assume A 0 = 1 mCi = 1000 µ Ci; then, Ã ( liver ) = 1 . 443 · 1000 µ Ci ( 0 . 3 · 0 . 5 hr + 0 . 1 · 5 . 5 hr ) = 1010 µ Ci-hr Ã ( kidneys ) = 1 . 443 · 1000 µ Ci · 0 . 2 · 1 . 2 hr = 350 µ Ci-hr D ( liver ) = 1010 µ Ci-hr · 4 . 6 × 10 5 rad Ci-hr + 350 µ Ci-hr · 3 . 9 × 10 6 rad Ci-hr D ( liver ) = 0 . 0465 rad + 0 . 0014 rad = 0 . 048 rad .  240 Chapter 10 Internal Dose Assessment S (Uterus Urinary bladder) = 1.6 × 10 5 rad/ µ Ci-hr S (Uterus Total body) = 2.6 × 10 6 rad/ µ Ci-hr The last S-value is not exactly what we need. It is the S -value for an organ being irradiated by activity uniformly distributed in the whole body (i.e., including bone, kidneys, etc.). The formula for calculating the S -value for remainder of the body for a given configuration of other source organs is: 30 S ( r k RB ) = S ( r k T B ) m T B m RB h S ( r k r h ) m h m RB where: S ( r k RB ) is the S -value for the remainder of the body irradiating target region r k S ( r k T B ) is the S -value for the total body irradiating target region r k S ( r k  #### You've reached the end of your free preview.

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