title: [Dose distribution in human body in external irradiation accidents].
abstract: OBJECTIVE
  To study the dose distribution in human body and dose parameters under various exposure conditions.
  
  
  METHODS
  In consideration of various factors, we calculated the dose distributions in human body by tissue-air ratio. Then dosimetric parameters were obtained. The calculation was verified by experiments using tissue equivalent anthropomophic phantom.
  
  
  RESULTS
  The more homogeneous the dose distribution was, the stem cell dose was closer to the average dose. Stem cell dose could be larger than average dose. The difference between stem cell dose calculated and that by experiments was less than 5%.
  
  
  CONCLUSIONS
  The calculation method and the program were reliable. The computer program has been applied in radiation accidents.
authors.affiliation: Institute of Radiation Medicine, Beijing 100850, China.
authors.forename: Y
authors.initials: Y
authors.lastname: Zhu
authors.forename: Y
authors.initials: Y
authors.lastname: Guo
mesh_terms: D000042:Absorption; D001330:Electronic Data Processing; D006801:Humans; D011829:Radiation Dosage; D018788:Radioactive Hazard Release; D014018:Tissue Distribution