title: [Application of color doppler ultrasound examination of thyroid in occupational health care of radiation-exposed physicians].
abstract: OBJECTIVE
  To explore the value of color doppler ultrasound examination of thyroid in occupational health care of radiation-exposed physicians.
  
  
  METHODS
  One hundred and thirty-four radiation-exposed physicians (observation group) and sixty-eight non-radiation-exposed physicians (control group) received color doppler ultrasound examination of thyroid using ALOKA SSD-4000 color doppler ultrasonic diagnostic apparatus, and the results were compared between the two groups.
  
  
  RESULTS
  The anteroposterior diameters of the left lobe, right lobe, and isthmus of the thyroid in the observation group were significantly larger than those in the control group (P < 0.01). Compared with the control group, the observation group had significantly larger internal diameters and peak blood flow velocities during systole of the right superior thyroid artery (P < 0.05, P < 0.05). There were no significant differences in detection rates of thyroid nodules and lymph nodes between the observation group and the control group (18.7% vs 13.2%, P > 0.05; 6.7% vs 1.5%, P > 0.05). The radiation-exposed physicians were exposed to low-dose ionizing radiation with a dose between 0.14 and 1.67 mSv/a.
  
  
  CONCLUSIONS
  The color doppler ultrasound examination of the thyroid can detect early changes in the thyroid of radiation-exposed physicians exposed to long-term and low-dose ionizing radiation.
authors.affiliation: Institute for Occupational Health, Beijing Center for Disease Control and Prevention, Beijing 100020, China.
authors.forename: Yue
authors.initials: Y
authors.lastname: Wu
authors.forename: Jing
authors.initials: J
authors.lastname: Liang
authors.forename: Chunjuan
authors.initials: C
authors.lastname: Xia
authors.forename: Haichun
authors.initials: H
authors.lastname: Zhang
authors.forename: Liping
authors.initials: L
authors.lastname: Yang
authors.forename: Guojun
authors.initials: G
authors.lastname: Li
authors.affiliation: E-mail: shenzhuang@126.com.
authors.forename: Zhuang
authors.initials: Z
authors.lastname: Shen
mesh_terms: D006801:Humans; D008198:Lymph Nodes; D016273:Occupational Exposure / Q000032:analysis*; D016272:Occupational Health; D010820:Physicians; D000069079:Radiation Exposure / Q000032:analysis*; D011839:Radiation, Ionizing; D013961:Thyroid Gland / Q000000981:diagnostic imaging* / Q000528:radiation effects; D018615:Ultrasonography, Doppler, Color