Classification of Radiation Exposure in Radiology The effects of radiation on the human body differ greatly,depending on whether the radiation dose is high or *** to the United Nations Scientific Committee on the Effe...
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Classification of Radiation Exposure in Radiology The effects of radiation on the human body differ greatly,depending on whether the radiation dose is high or *** to the United Nations Scientific Committee on the Effects of Atomic Radiation(UNSCEAR),the cut- off level defining low-versus high-dose radiation may be set at 200 mGy(in terms of the dose absorbed by the tissue) on the basis of various oxisting *** the radiation dose is lower than this level,DNA damage due to radiation can be repaired in 2 *** it comes to defining the effective radiation dose level,the cut-off level defining a low versus a high effective dose may be set at 100 mSv,because no linear relationship between dose and incidence
目的：评价输尿管良、恶性狭窄和梗阻双途径介入治疗效果。方法：131例输尿管狭窄或梗阻,其中良性125例(149侧),恶性6例(9侧);采用经皮肾穿刺,经尿道双途径球囊扩张并置入双“J”支架管,联合介入性治疗方法。随访6个月～10年,从拔除双“J”支架管后开始,随访期间 B 超、同位素或 IVU 检查。结果：良性输尿管狭窄和梗阻125例,共149侧输尿管进行扩张治疗,成功123例,失败2例。恶性输尿管狭窄和梗阻6例(9侧),均获成功。治愈95例,占73%;好转34例,占26%,无效2例,占1%,总有效率99%。结论：经皮穿肾经尿道双途径球囊扩张并双“J”管置入,联合介入治疗输尿管狭窄和梗阻,创伤小,并发症少,治疗效果显著。
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