ENVIRONMENTAL PROTECTION AGENCY
Lande{Lb {21
LS
SOUTHWESTERN RADIOLOGICAL HEALTH LABORATORY
Date:
ply to
January 8, 1971
.TE
tn of:
ODC: LEH
bjiect:
Effects of Irradiation on the Thyroid Gland
To:
ACV AE? 7
é
Geneva Douglas
Information Officer
Source of
Amount
Administered:
Irradiation
l. Marshallese
Fallout,
former
peasi
131,
2. Children
and adolescents
treated for
thyrotoxi-
Medically
administered
isotope
2~32 mCi
Average:
6.6 mCi
3. Rochester
subgroup C:
children
treated with
X-irradiation
from X-ray
unit
None
335 rad
335 rad
X-irradiation
from X-ray
None
20 rad
20 rad
1954
from nuclear
11.2 pCi
Dose to Thyroid
Total
Thyroid
Study Group
people of
Internal
External
Irradiation:
175 rad
Dose
Adults:
160 rad
chidren
700-1,400
~
rad
10-13,000
rad
cosis
X-irradiation
for Thymic
enlargement.
268/3,000 had
been treated
in infancy in
a Similar
Ianner
4. 1965 Ann
Arbor series:
758 children,
irradiated in
infancy for
Thymic enlargement
2ne
{tT2A1L
unit
— Dw
Effects
(See Att.
Sheet) -
a