\
hee
wh
of 40,000 feet
Alamos Scientific Laboratory has
monkeys with a
dose
rats, mice, and
10,000 to 30,000 curles.
but after
Eventually,
intervals, all refused to perform completely certain
The experiments
tasks.
learned
of
the Los
limits
temporarily lost coordination and
following exposure.
became nauseated
different
Irradiated
barium lanthanum source
In one experiment monkeys
these
To determine
or higher.
Liles between
that
showed
the
is no
There
30,000 roetgens.
10,000 and
incapacitating
significant change 1n the relative biological effectiveness of
from 6,000 to 9,900
gamma rays when dose rates are varied
roenteens per minute.
(End
of CONFIDENTIAL section.)
DetectionandTreatmentofBrainTumors (UNCLASSIFIED)
17.
Massachusetts Geneval Hospital
in Boston
is developing
instruments and techniques to aid in the external localization
of brain
tumors.
Radivoactive
isotopes administered
intravenously
to animals in whitch tumors have been induced womeen trate
eerous and normal tissues in varying ratios.
concentration In the
coincldence
tumor mass enables
counting with newly developed
the tumor mass within the
18.
the
In can-
A slightly higher
investigators by
instruments
to locate
4
head.
The Northwestern University Medical School in Chicago
has been developing applications of
possible treatment of brain tumors.
tonizlng radtation
in the
Small pleees of gelfoam
were
implanted
in the brain tlssues of
50 healthy adult
A small zone of dead 1issue soon surrounded the site of
tion.
However,
was replaced
possible
later examination disclosed
by regenerating tissue.
therapeutic application
Implanta-
that the dead
The cxperiments
of radioactive
- oOo-
cats.
gold
tissue
suggest a
or chromic
Part VI
eee Dat
impregnated with radioactive colloidal gold cr chromic phosphate