J
radiation, of course, damages any blood forming tis:ue
n the direct field,
At the
present, ellfattempts to demonstrate ank Windtrect effect" peculiar to radiation
on the bicod forming tissues hid foiled.
However, the reduction jn white blood cells
sometines found in man after treatment to local areas thought to contain but relatively little bloot-forming tissue remains poorlg understood.
‘The question requires further
eritical study.
Internal Radiaifion
This invibves chiefly the use of radioisotepes and ditfers from other types
of radiaiton chiefly in that relatively non~penetrating radidtions euch as alphg and
beta rays can be introduced into the body where they may rediate tissues they could
not reach by sxterrial application.
This opens the possibility of giving radiation to
tissuss without apnarently affectins others.
Reacicactive iodine and
redioootive nhesphorous are cxemples of substances thus empleyed.
In gencral, the
ao
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2
ae
,
2
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+
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effaet
o!n ridifosstive
presphcivus
int
he 1?
blocc-Sorging
organs corresponds wiosely to
PR ae?
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oS.
seape
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the offecte.
attainable
by externcl
rodiatione
The Tffect ofNeutror.s
a
The effects on the blooed-lorming tissu
of H-rayee.
spo essentially siziler to these
Using fast neutrons, the biologic danare resulting from ln (erount of
noire radieiton producing some amount of lonizatiog as lr H~radAstion in an
Sattioun chamber) is about eight tines es great as thet resulting from lr.
Effects of Radiation on Man
Wv
The purpose of all the dpe work revieved is to get a better idea of the
effsct of rediation on gan.
Acute exposures to sfnvle deess of whole body radiation
mey occur in min, as aneccidient, or after detonation of an atoric bomybe
are otherise seldom encountered,
They
In Ajividueds stodied in denen who wer:
exposed to radiation at the time of the detonation of the bacb, the abnormalities
in the blddd were found si:ilar to these experinentally in animals.
The first ab-
normality noted was reduction inthe numb:r of white blood cells, the second was re~
Anation fn hland nlstetate
anil tha thiwnd ano wv Anat san fn we A RDAAD
AAT.