放射性

Objective To observe the modulation by Blood-cooling and Blood Flow-promoting Herbs to expressions of tumor necrosis factor u and basic fibroblast growth factors in radiation-induced lung injury of rats at different radiation times, and explore the mechanism of prevention and curative effect of the herbs on radsation lurg injury.

目的 通过观察凉血活血中药对剂量分割重复照射下大鼠肺组织肿瘤坏死因子-α、碱性成纤维生长因子在不同时相动态表达的影响，探讨其防治放射性肺损伤的作用机制。

Results Contrast CT or MRI showed prominent irregular circular or nodular enhancement in 14 of 16 cases (64%),can not distinguished from postopertative changes, radioinjury, tumor residue or recurrence.Among them, 9 cases showed tumor residue or recurrence based on significantly increased FDG uptake, 5 were confirmed by pathologic study. The other 5 cases of cerebral necrosis and 2 cases with postoperative cerebral malacia demonstrated FDG uptake defects.

结果 16例中87.5%(14例)CT和MRI表现不规则环形或结节状明显强化，不能准确作出手术后改变和放射治疗后脑损伤、残存肿瘤或肿瘤复发的诊断；其中9例残存肿瘤或肿瘤复发病灶18F-FDG PET影像表现为葡萄糖代谢明显增高，有5例得到手术病理证实；另5例术后放射治疗后脑损伤患者和2例术后软化灶18F-FDG PET影像均显示局部病变区为放射性分布缺损或明显低下。

The risk factors of breast carcinoma includes family history (The likelihood of developing breast cancer for a patient, if one of whose mother or sisters does, will increase by 1.5 to 3 times.), age, BMI, hereditary factors (The risk of developing breast cancer for a female whose BRCA1 gene has been mutated reaches 50-85% in her life.), female, contact history of the endogenous and exogenous estrogen, past history of chest being exposed to the radiation, dietary pattern, benign mastopathy and environmental factors.

发生乳腺肿瘤的危险因素包括：家族史（假如患者母亲或姐妹当中有一人发生乳腺癌，该患者乳腺癌发生的可能性增加1.5至3倍），年龄，肥胖，遗传性素因（BRCA1基因突变的女性一生中发生乳腺癌的可能性为50－85％），女性性别，内源性和外源性雌性激素接触，既往有过胸部放射性暴露史，膳食结构，良性乳腺疾病和环境因素。

The GDI, a high-tech alliance of the world's most advanced nations, is fighting to contain Tiberium, but Kane, the megalomaniacal leader of The Brotherhood of NOD has other plans for Earth.

严重性就像冰河时代放射性的扩散开来。GDI全球防卫组织，拥有高科技的联合国组织，积极的想要控制泰伯伦矿的生长及扩散。

Carbon has two non-radioactive isotopes, and in material from the solar system, including most meteoritic minerals, these are mixed in a well-known ratio.

碳有两个非放射性的同位素，在太阳系的物质中，包括在大多数的陨石矿石中，它们的混合比例是众所周知的。

Objective Traditional MIRD method for dose assessment in nuclear medicine assumes that radionuclide is homogeneously distributed in organs, and the dose to cells and cell nucleus is presented by mean dose to the organ.

目的核医学中传统的MIRD剂量估算方法是假设放射性药物在器官内均匀分布，用器官的平均剂量描述每个细胞及细胞核的剂量。

Methods Based on time-order SPECT/CT infusion imaging and ^153Sm-EDTMP assay of patient urine, the absorption dose of bone lesion and the different organs were calculated with Monte Carlo EGS4 and MIRD methods.

方法基于病人时序性SPECT/CT扫描和累积尿液的放射性测定，利用优化的MC EGS4程序和MIRD方法分别计算病灶和其他靶器官的吸收剂量。

The contributions of photon radiations are ignored because they are negligible compared to the contributions of the particle radiations, or can be calculated and added to the S-values using MIRD formulae.

如果细胞群较小，则光子的剂量贡献忽略不记。细胞群中每个细胞内的放射性活度相同。计算得到细胞群中各个周围细胞中心到靶细胞中心的距离和周围细胞中的核素对靶细胞的剂量贡献。

Results The radiation injury tolerance dose of mucocutaneous membrane in the treatment group was significantly high...

结果观察组皮肤黏膜的辐射损伤耐受剂量明显高于对照组(P·05)；观察组中发生严重皮肤黏膜放射性损伤的概率低于对照组(P·05)。

Objective To evaluate the effect of the Protective Spray against Rays for Medical Use on the acute mucocutaneous membrane injury induced by irradiation.

目的探讨&医用射线防护喷剂&对皮肤和黏膜急性放射性损伤的临床价值。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。