Koshida K, Koga S, Orito T, Hiraki T, Takeuchi A, Nishizawa K, Ito K
Kaku Igaku. 1989 May;26(5):591-9.
This paper describes levels for discharge from hospital and return to general ward of patients treated with 131I. The level was determined by comparing the possible exposure dose to those individuals whom the patients are in daily contact with the annual dose limit for the public. The external exposure dose was calculated by using the data on the distance between the patient and individuals, length of the time spent at each distance, and each individual's age. The following levels were obtained: (1) For the patient to be discharged from the hospital, the maximum residual radioactivity should be less than 0.51 GBq if the distance from the patient in bedroom is 50 cm or more and the ages of her children are all over one year. No restriction is needed for the patient with residual radioactivity of 0.20 GBq. (2) For the patient to be returned to the general ward, the maximum residual radioactivities should be 28 MBq and 41 MBq, corresponding to the distance from the patient of 2.0 m and 2.5 m respectively. We established a method to analyze the factors affecting the level.
本文描述了接受¹³¹I治疗的患者出院及返回普通病房的标准。该标准是通过将患者可能对与其日常接触的人员造成的照射剂量与公众年剂量限值进行比较来确定的。利用患者与他人之间的距离、在每个距离处停留的时间长度以及每个人的年龄等数据计算外照射剂量。得出以下标准：（1）对于即将出院的患者，如果其在卧室中与他人的距离为50厘米或更远且其子女年龄均超过一岁，则最大残留放射性应小于0.51吉贝可。残留放射性为0.20吉贝可的患者无需限制。（2）对于即将返回普通病房的患者，最大残留放射性分别应为28兆贝可和41兆贝可，对应患者与他人的距离分别为2.0米和2.5米。我们建立了一种分析影响该标准的因素的方法。
