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38
INTERNAL DEPOSITION GF RaseueUCLIDES
Pictuage 3.2—Amtoradiograph of tibia of chicken sacrificed 45 days post:
dctonation (ANL).
Marrow cavity tn this tibia contaimed dense
trabecular bone along its entire length, a formation not normally found in manimalian bones.
There are also two distinct areas of increased
density in the trabecular region, which appear
as two lines of radioactivity in the autoradiograph. The center of the diaphysis was abnormally thick, possibly because of a failure of
the normal resorptive process.
No other evidence of a double line of radio-
active deposit appeared in the animals studied, ©
except possibly in a sow sacrificed 38 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 (4) has shown that a typical osseous
tissue in trabecular space is a characteristic
lustopathologiceal finding following radioactive