放射性

In the combined treatment of the craniopharyngiomas, it is very important to prevent the irradiation injury of the surrounding structures such as the optic nerve, chiasm, hypothalamus and vascular structures. In those structures, the optic nerve and chiasm are the most sensitive ones to the irradiation, and their ability to bear the irradiation is about 9 to 12 Gy. So if the irradiation dose is lower than 9Gy, the treatment will be safe. We have not found any report about the bearability and side effect of the hypothalamus related to the gamma knife radiosurgery.

在治疗过程中，预防病变周围的重要结构如视神经，视交叉，丘脑下部和血管结构的放射性副损伤是非常重要的，在这些重要结构中，视神经和视交叉对放射线最为敏感，其耐受能力约为9～ 12 Gy，因此如果对这些结构的放射剂量在9Gy以下，治疗将是安全的，目前尚无有关丘脑下部的耐受剂量和放射性损伤的文献报道。

A kind of in-situ measurement method is introduced in this paper, by which the radioactivity in the clayey sand of ground surface contaminated by radioactive particulates can be investigated.

本文简要介绍一种对放射性微粒污染的地表砂土中放射性核素活度的就地测量方法。

Results:Acute radiocystitis occurred in one of 7 patients with cervical carcinoma after radiotherapy and cured by expect ant treatment after stopping radiotherapy. Chronic radiocystitis occurred in 6 of 7 patients and cured by expectant treatment, cleaning blood clot and electroc autery hemostasis under cystoscope.

结果：7例宫颈癌放疗后发生急性放射性膀胱炎1例，停止放疗后经对症处理痊愈；发生慢性放射性膀胱炎6例，分别经对症处理、膀胱镜下冲洗清除血块、电灼止血痊愈。

The decay of ~(99m)Tc source was used to verify experimentally that in the measurement of the number of atoms of a radioactive isotope in a sample at time t_0, the error introduced through the inaccuracy of its decay constant can be reduced to a much smaller value by the careful selection of the time of measurement or measurements of its radioactivity at around one life time (1/λ) after t_0 and doing the calculation.

本文用~(99m)Tc源的衰变实验证明了：在测量一个样品中在t_0时的一种放射性同位素的原子数时只需精心选择一次或多次测量其放射性的时刻在t_0后约该同位素的一个寿期(1/λ)，并进行计算，则由它的衰变常数或其半衰期(T1/2)的不准确性而引进的误差可以被降低到较小值。

Environmental treatment and monitoring must be done after decommission of uranium mill tailing impoundment.

铀尾矿库退役后要进行环境治理和长期监测，对库中放射性核素进行模拟可以为放射性废物安全管理提供科学依据。

An "enhanced radiation " warhead is just what it says, a nuclear weapon where the design has been "tweaked" so that a larger fraction of the energy release from fission/fusion comes out of the bomb case as radiation .

一个"增强放射性的弹头"应像它说的那样，则应有众多的微量能量从"核弹"中释放出，放射性。

The emulsion plays an important role of effectively reducing the side effects of harmine in nervous system.

结果：静脉乳剂可显著提高放射性在肝、脾、淋巴器官的分布，降低放射性向脑组织的转运。

Results The PET/CT imaging was performed for 62 patients including 7 cases with central bronchial carcinoma, and 55 cases with peripheral lung cancer. 59 cases with confirmed diagnosis, the diagnostic accuracy rate was 95.16%. Some abnormal enrichment can be seen by 18F-FDG PET/CT. The largest SUV is 1.0～22.3. Radioactivity intussuscept can be seen by 11C-MET and PET-CT, and SUV is 0.5～4.9. Vessel bunch is available by CT enhancement scan that can clear the borderline of lession. Sublobe,spicule sign,depressed pleura,and bronchia obstruction can be seen by HRCT.

结果 62例肺癌患者中，中央型肺癌7例，周围型肺癌55例，明确诊断59例，诊断率95.16%。18F-FDG PET/CT检查见病灶有不同程度放射性异常浓聚，最大SUV1.0～22.3； 11C-MET PET/CT检查的病灶均见不同程度放射性摄取，SUV0.5～4.9；CT增强扫描病灶边界清晰，明显强化，可见血管"集束征"， HRCT检查见病灶有分叶、毛刺征、胸膜凹陷征及支气管阻断。

Any of several radioactive gases that are isotope s of radon and are products of radioactive decay.

"几种氡的同位素的放射性气体，是放射性物质衰变的产物。"

In order to meet the safety requirement of radioactivity logging of oil industry, the radioactive source status monitor is developed.

根据石油行业放射性测井工作的安全需要，研制了放射性源状态监测仪。

Do you know, i need you to come back

你知道吗，我需要你回来

Yang yinshu、Wang xiangsheng、Li decang,The first discovery of haemaphysalis conicinna.

1〕 杨银书，王祥生，李德昌。安徽省首次发现嗜群血蜱。