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registry prep 3

registry prep Qs 3

QuestionAnswer
Annual dose limit for a student 100mrem (.1rem)
Annual dose limit for the general population .5rem (5msv)
Early radiation exposure to a fetus may affect what system? skeletal
Later radiation exposure to a fetus may affect what system? neurological
Gestational dose limit for a fetus 500mrem (5msv)
SI unit for rad Gy
SI unit for rem SV
100rad to Gy 1Gy
100rem to SV 1sv
Rem formula rad X QF
An OSL dosimeter uses: aluminum oxide
A TLD dosimeter uses: lithium flouride
Name the rare earth phosphors Gadolinium, Lanthanum, Yttrium
Calcium tungstate emits what color? blue/violet
Rare earth phosphors emit what color? green or blue
Loss of overall density is a result of what grid error? angulation error, off center error
Loss of density at the periphery is a result of what grid error? off focus/SID error or an upside-down grid
mAs change used when switching from single phase to 3phase 6p reduce by 2/3
mAs change used when switching from single phase to 3 phase 12p reduce by ½
developer temp 92-95F (35C)
film storage temp 70degrees F
darkroom humidity level 40-60%
Created by: annaluz87