radiation and pregnancy Flashcards
1
Q
dose relevant stages of gestation
A
pre-implantation
organogenesis
fetal period
2
Q
predominant effect from sentinel studies (hiroshima/nagasaki)
A
microcephaly and retardation
3
Q
microcephaly timing
A
0-7 weeks
4
Q
retardation timing
A
16-25 weeks
5
Q
microcephaly and retardation timing
A
8-15 weeks
6
Q
doubling dose
A
dose of IR to cause as large an additional rate as that which occurs spontaneously in each generation
7
Q
% of humans born malformed
A
6%
8
Q
Excess absolute risk for leukemia and x-ray exposure
A
6% per Gy
9
Q
Dose and increased risk for childhood cancer and malformation
A
100 mGy = 1%
10
Q
monthly limit to embryo
A
0.5 mSv
