ABR Flashcards

Physics
for studying for the ABR part 3 exam

Sample Data

Front HU equation-values
Back HU = 1000*(u-uH20)/(uH20-uair)u = linear attenuation coefficientAir: -1000Water: 0Lung: -500Fat: -100Muscle: 40
Tags
Text Sealed source leak testing every {{c1::6 months}} for T1/2 > {{c1::30 days}}: contamination > {{c1::185 Bq}} requires source to be removed from service
Extra 10CFR35
Tags Regs_Safety
Front Barrier transmission factor (B) facts- adding B factors- tenth-value layers (TVL's)- First vs. later TVL's
Back B factors are multiplicative (Btot = B1*B2*B3...)Number of tenth-value layers: n = -log10(B)TVL1 - first TVLTVLe - equilibrium TVLTVLe < TVL1 because scattering is more important than beam hardening in TVL1Barrier thickness: t = TVL1 + (n-1)TVLe
Tags Shielding
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