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INTERNAL DEPOSITION OF RADIONUCLIDES
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Fictxe 5.2.—Autoradiograph of tibia of chicken sacrificed 45 days post-
detonation (4NL).
mirrow cavity in-this tibia contained dense
trabecular hone along its entire length, a forma{ion not normally found in mammalian bones.
There sre also two distinct areas of increased
density in the trahecular rezion, which appear
as two Hnes of radioactivity in the antoradiograph. The center of-the diaphysis was abnormally thick, possibly because of a failure of
the normal resorptive process.
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No other evidence of a double line of radioactive deposit appenred in the animals studied,
except pussibly in a sowsacrificed 35 days post
exposure (Fig. 5.5). Here a faint deposit of
activity in the trabecular bone is noted, separate from the higher level in the epiphysis.
Looney. (8) has shown that a typical osseous
tissue in trabecular space ig a characteristic
histopathological finding following radioactive