摘要
计算有效剂量时 ,膀胱有 0 .0 5的组织权重因子值。为计算摄入放射性物质对膀胱壁产生的当量剂量 ,需要放射性物质经肾 膀胱排泄的剂量学模型。ICRP 5 3号出版物给出了该模型的数学表达式。不过 ,这些表达式只适用于能从体液直接经尿排泄的物质。本文导出了摄入放射性物质经体内若干器官、组织依次转移然后经尿排出时 ,其在肾尿路、膀胱内容物中衰变数的计算式 ,并以吸入99mTc标记的DTPA气溶胶为例 。
In order to calculate the effective dose,an explicit tissue weighting factor of 0.05 is given for the bladder. Consequently a model for kidney bladder excretion is needed to calculate the additional equivalent dose to bladder wall from activity in urine. The mathematical expressions of the model were proposed in ICRP Pub. 53. However,the expressions can only be applied to the materials excreted directly throngh urine from body fluids. If the intakes were transferred among the tissues or organs of body successively and excreted in urine, the available expressions calculating disintegration of the intakes in urinary path and bladder contents were derived in this paper.(
出处
《辐射防护》
CAS
CSCD
北大核心
2003年第2期84-89,101,共7页
Radiation Protection
关键词
肾
膀胱
排泄
剂量学模型
放射性核素
内照射剂量
膀胱内容物
衰变数
计算
放射性治疗
Radionuclides, Internal Dose, Model for Kidney Bladder Excretion, Urinary Path, Bladder Content, Calculation of Disintegration)
