2,500
2,000}—
a
°
e
3,300
e
ee
e
°e
ee
%
e
i
e
®
e
e
e
®
500
6
e
Dese of kt Dey
70
85
Dose during 2 Weeks
190
00
p88 §
3
Cumviative Persent
é xi0-3
Fig. 4.
290
0
310
300
370
40
700.
OR
sR
Correlation between Minimal Neutrophils Count and Dose of Gamma Radiation
_
Fig. 3.
130
0
e
rec
Cumulative Distribution Curves (RBC)
Platelets
Platelets counts showed increasing depression,
reaching minimum at the 4th-7th weeks. The
recovery began during the following several
weeks. The cumulative percentage curvestill
displaced to the left of normal curve after one
year.
The results of other tests related to haemor-
rhage showed depression at the early stage in
general and recovered by the 10th week.
Bone marrow
The bone marrow was aplastic at the critical
stage in severe cases, which showed remaining
and proliferation of plasma cells and reticulum
cells. With the beginning of recovery, aplastic
marrow changed to hypoplastic and then turned
into a type of maturation arrest. Recovery was
not complete even after one year. In the cases
not so severe as these, the bone marrow was
not
‘'stic but hypoplastic or a type of maturation arrest even at the critical stage.
Morphological abnormalities
Several morphological abnormalities, e.g. abnormal granules in lymphocytes or neutrophils,
vacuoles in various leucocytes and megakaryocytes, giant nuclet and hyper-seymentation of
neutrophils, binucleated lymphocytes, abnormal
mitosis of erythroblasts, etc. were observed for
about one year, especially at the critical and
the recovering stages.
Erythrocyte sedimentation rate was accelerated in
the early stage in some cases.
4. Spermatopoiesis
The examinations of spermatopoiesis were performed on 18 patients several times.
Number of spermatozoa decreased about 2
months after the initial exposure, and azov-