Examination of Blood Counts on the X-Ray Technicians Working at Health Centers in Japan in 1967

Abstract

In these some ten years， incidence of radiation hazard as well as the exposure uf employed has decreased very nluch as the res 山 of improvments in the construction of X ． ray rQom ， equipments and protection techniques ， The results of nation − w 三 de survey on the X − ray photofluorogruphy at Health Centers conducted by the Ministry Qf Health and Weefare were analyzed with respect to the blood counts of the X ． ray technicians and compared with normal healthy man ． The results are sunlmarized as follows ： (1) The mean values for X − ray technicians in Health Centers of leucQcyte ； erythrocyte counts and hemo ． globin were 6 ， 310± 1 ， 300 ， (472± 54) × 10 些 and 93 ， 7± 9． 6％ ， respectively ． Leucocy 毛 e counts and hemoglobin value are lower than n ・ rmal values at 1％ signi 丘can し level． (2) Comparison between the technician and nQrmal person for each age groups also showed signi 丘cant IQwer values of blood counts in the technician expect in the age group over 50 years ． (3) When geographical grouping were made ，出 e variability of blood counts in the technician was smaller than in normal healthy person ． Ho ｝ vever ， the pa む tern of l(⊃wer values was significant in the districts Tohoku ， Kinki and Kyushu f〔，r the leuc 【) cyte count ， Hokkaido ， Shikoku and Kyushu f(，r tlle erythrocyte count and Hokuriku and Kyushu for the hemoglohin value ． (4) This study showed that 111 persons of the total 1 ， 372 investigated technicians ，(8． 1％) ， were abn く) rmal in view of the legislative standard for rad 玉 ati 〔｝ n hazard ， は じ め に