34
RFFFOUS
ih
4
ountment. wit! App oren’
uecess, When cre
epithelium was descuamating, all estas ser
RADIATTON
tAINGG
the jatter would penetrate well into the dermis
need
treated by daily waeuirg with soap ard «tes
followed by the app ocetion of a wate soedtee
ranishing: type om nent vhich ikepr the a
jured skin soft ang babble Raw reas, wd
takes s00 microns of tissue to produce
‘hercent attentation of this energy radiation
ee
Ino addition, a wide speetrum of
‘anim
efergies
fahine
contribution
irradiated
to
the
the skin
skin.
The
was small
became
Fompared to the beta dose and is discussed in
hapter I
tact as long as ho ss-nptoms were present
If
pamful, the tla has aspirated) with steri.:
452
secondars: ¥ 1 fected, were ‘leattised
with soap and aureamyen omtment was uy
pled. Bullous jesio's of the feet were left a
technique and ¢ pressure dressing applied
4
single aspiration sas adequate since the bullae
did not refill. Tn tne instance. um extensive,
‘aw, Weeping Uver veveloued for which pen
cillin was given %o two days.
During ‘his
time the lesion developed healthy granulation
tissue. Some uf tie lesions of the skin of the
foot remained ‘hickened and tess phable after
desquamation.
Thus was reheved by the use
of vaseline or cocou butter to soften the tis
sues.
The one persstent ear lesion did et
heal after desquamation
daily with warm bert
washing
eschar.
with <urg ca
Thos Was trented
acid compresses ine
~oap
fO
remove
the
Slowl. regenerating epithelum grew
in from the edves of the uleer
Upon reexan.
mation, § months after exposure. heaing wits
complete with a
as evidence of
3.5
3.51
der remmenred sear remaynin
he prey ous uleeration
Factors Intuencing Severity of
the Lesions
Character of the Fallour Material
This materiat was composed mainly of
ai
elum oxide from 1! + nemerated coral, Witte
adherent tissior Prod icts. Mifty to erglity pet
cent of the beta rays emanating from this ria
terial during the exposure period had in aver
age energy of abou [00 Kev. Since 800 nu
crons Of tissue
orodu es 30 percent atteniatian
of such radiation
ok greater portion 0°
energy was dissipated nthe epidermis hac:
is roughly 40 ty 7 ofoerons in cuckness, Ul
remaining 20 00 00 percent of the beta rays tac
an averaye energy
epproximmrtely HO Kes
Dose to the Skin
The skin lesions observed resulted primarily
from beta radiation from fallout material deposite on the skin.
The gamma dose to the
-kin wis small compared to the beta dose, and
ius relatively unimportant in producing the
Polos
The summation of gamma and beta
contributiens to the skin is considered in Secior 1.3. In general it is evident that skin incurv was lirgely produced by material in conraet woth the skin. The total surface dose canwot be caleulated with accuracy but minimal
wid maximal values at various depths in the
-kue can be estimated biologically. Hair folles iy the areas in which eptlation occurred
must have recerved a dese in excess of the
known minimal epilating dose of about 400 r
for 2 kvp N-ray. Since regrowth of hair oc‘arred, the apper limit of dose at the depth of
the sair follicle must not have exceededthe permanent epilating dose of around 100 r of 200
N-ray (3). From this a rough idea
f surtace dose may be made. A dose to the
liu follicles comparable to 400-700 r of X-
sV¥P
radiation must have been due almost entirely
"oO the more penetrating beta component (averie energy 600 kev). Therefore, the minimal
~urtace dose in rep from this component alone
Nas probably four to five times the dose at the
nan follicle. ie. reughly 1600-3500 rep.
The soft component (average energy, 100 kev)
ontributed a considerably larger share to the
urtace dose but with only slight penetration.
‘43
Protective Factors
The “ollawing factors provided some protec-
ap