^99mTc（V）—DMSA及^99mTc—MIBI肺显像诊断原发性肺癌的应用研究

对３０例原发性肺癌患者分别应用＾９９ｍＴｃ（ｖ）－ＤＭＳＡ及＾９９ｍＴｃ－ＭＩＢＩ显像。结果表明：＾９９ｍＴｃ９Ｖ）－ＤＭＳＡ，＾９９ｍＴｃ－ＭＩＢＩ敏感度分别为９０％，７６．７％。两者结合显像阳性率为９６．７％。鳞状上皮细胞癌对＾９９ｍＴｃ（Ｖ）－ＤＭＳＡ及＾９９ｍＴｃ（Ｖ）－ＤＭＳＡ，＾９９ｍＴｃ－ＭＩＢＩ摄取程度比其它类型的肺癌高。     

^99mTc—MIBI心肌显像对急性心肌梗塞溶栓治疗的评价

２０例急性心肌梗塞患者（其中溶栓再灌注组１２例，无再灌注组８例）在溶栓前及发病后５－７天行＾９９ｍＴｃ－ＭＩＢＩ心肌显像，观察心肌缺血的状况，结果表明，尿激酶在发病６ｈ内给药者，２ｈ血管再通率为６６．７％，发病６－１２ｈ内给药者，２ｈ血管再通率为５０％，再灌注组和无再灌注线溶栓前心肌显像心肌缺损得分无显著差异，再灌注缚溶栓后心肌得分显著低于溶栓前（Ｐ〈０．０１）。缺损得分减少７０．２±１０．８％，     

心肌显像剂99mTcN-BMPBDA的制备及动物体内分布研究

为了寻找新的具有亲心肌性质的＾９９ｍＴｃＮ药物,合成了一种新的Ｎ２Ｓ２配体：Ｎ,Ｎ＇－二（２－巯基丙基）－１,２－苯二胺（ＢＭＰＢＤＡ）。以ＳｎＣｌ２为还原剂,Ｈ２ＮＮＨ－（Ｃ＝Ｓ）－ＳＣＨ３为Ｎ＾３－给予体,通过交换反应制备了放化纯大于９０％的＾９９ｍＴｃＮ－ＢＭＰＢＤＡ。探讨了ｐＨ值对＾９９ｍＴｃＮ－ＢＭＰＢＤＡ放化纯的影响,并对其小鼠生物分布进行了研究。结果表明,＾９９ｍＴｃＮ－ＢＭＰＢＤＡ     

^99mTc标记环己二酮二肟及其甲基硼酸加成物和初步动物实验

实验结果表明，＾９９ｍＴｃ－ＣＤＯ的标记率受体系的ｐＨ值影响较小，而＾９９ｍＴｃ－ＣＤＯ－ＭｅＢ只有在ｐＨ＝３．５－４．０时标记率才能大于９０％。小鼠体内分布实验表明，＾９９ｍＴｃ－ＣＤＯ－ＭｅＢ在动物心肌中较高的吸收，但随时间延长而迅速清除。心／肝比值在给药后１、５和１０ｍｉｎ时分别为３、１．５和０．８。＾９９ｍＴｃ－ＣＤＯ在心、脑中的浓聚明显低于９９ｍＴｃ－ＣＤＯ－ＭｅＢ。     

^99mTc标记抗心肌肌凝蛋白单克隆抗体在实验性心肌梗塞中的研究

为比较＾９９ｍＴｃ－ＡＭＬＡ的特异性，将两组心肌梗塞２４ｈ大鼠分别注射＾９９ｍＴｃ－ＡＭＬＡ（ｎ＝２４）和＾９９ｍＴｃ－Ｎ－ＩｇＧ（ｎ＝１８），为研究不同心肌梗塞时间对摄取抗体的影响，将另一组不同心肌梗塞时间（２ｈ到１４ｄ共８个亚组）的大鼠注射＾９９ｍＴｃ－ＡＭＬＡ，计算三组的ＩＤ％／ｇ和梗塞心肌摄取／正常心肌摄取比（ＩＭ／ＮＭ）用一只心肌梗塞的狗注射＾９９ｍＴｃ－ＡＭＬＡ后离体心肌显像，结果表明     

^99mTc—MIBI心肌灌注显像潘生丁试验一天法在冠心病诊断中的应用

介绍了对１６１例冠心病患者采用＾９９ｍＴｃ－ＭＩＢＩ心肌显像潘生丁试验一天法方案进行检测的结果，其中２０例与冠状动脉造影进行了对比观察。患者先作＾９９ｍＴｃ－ＭＩＢＩ静态平面与断层心肌显像，接着进行潘生丁试验，再于静脉注射＾９９ｍＴｃ－ＭＩＢＩ后１ｈ作平面与断层心肌显像。采用本方法诊断冠心病的灵敏度为９１％。其检测ＬＡＤ的灵敏度为８８％；诊断ＲＣＡ及Ｌｃｘ的灵敏度分别为８１％与７７％、特异性分别为     

含服硝苯吡啶对99mTc-MIBI心肌显像的影响

为观察硝苯吡啶对＾９９ｍＴｃ－ＭＩＢＩ心肌断层显像的影响，把３５例冠心病患者分成硝苯吡啶组和硝酸甘油组，隔日行介入心肌断层显像，静注＾９９ｍＴｃ－ＭＩＢＩ后１ｈ和５ｈ时分别采集图象，分析结果显示硝苯吡啶组虽有４０．０％的心肌节段摄取较用药前改善，但１ｈ显像有３３个节段出现逆向性摄取减少，其中２９个节段５ｈ显像又恢复正常。硝酸甘油组有６９．５％心肌节段较用药前摄取改善，１ｈ显像未见有逆向性摄取减少，     

^99mTc—MIBI心肌断层显像进行急性心肌缺血冠脉再通术早期评价的实 …

通过动物模型验证系列心肌灌注显像判断急性缺血后再灌注心挽救的价值，将２４只狗模拟临床急性心肌缺血冠脉再通术后转归，分为缺血－有效心肌挽救（Ｉ）组、缺血－延迟再通组和血－无再能组。所有动物接受缺血当时，灌注重建后即刻之后７天、１４天及２８天系列＾９９ｍＴｃ－ＭＩＢＩ断层显像。在极座标靶心图上求出各次显像时心肌缺损分数（ＤＦ），并与病理证产心肌缺血分类（ＩＦ），心肌梗塞分数（ＮＦ）对比，结果Ｉ组从第２     

~(99m)Tc-MIBI 心肌断层显像进行急性心肌缺血冠脉再通术早期评价的实验研究

通过动物模型验证系列心肌灌注显像判断急性缺血后再灌注心肌挽救的价值。将２４只狗模拟临床急性心肌缺血冠脉再通术后转归，分为缺血－有效心肌挽救（Ⅰ）组、缺血－延迟再通（Ⅱ）组和缺血－无再通（Ⅲ）组。所有动物接受缺血当时，灌注重建后即刻，之后７天、１４天及２８天系列９９ｍＴｃ－ＭＩＢＩ断层显像。在极座标靶心图上求出各次显像时心肌缺损分数（ＤＦ），并与病理证实心肌缺血分数（ＩＦ）、心肌梗塞分数（ＮＦ）对比。结果Ⅰ组从第２次显像起，ＤＦ持续下降；Ⅱ组ＤＦ下降程度小；Ⅲ组ＤＦ无降低。首次显像的ＤＦ与ＩＦ相关良好；末次显像ＤＦ与ＮＦ相关。再灌注后，即刻与再灌注前ＤＦ差在三组动物间有明显差别，并与每组动物的最后结果趋势一致。表明系列９９ｍＴｃ－ＭＩＢＩ显像可以准确、及时反映缺血－再灌注后心肌实际状态；缺血当时显像的ＤＦ显示缺血影响范围，而数周后显像ＤＦ反映坏死心肌大小；再灌注后即刻显像可提供准确、可靠的介入响应及预后的信息；冠脉介入前、后，及３—４周后显像的临床实用价值最为明确。     

~(99m)Tc(Ⅴ)-DMSA 及 ~(99m)Tc-MIBI 肺显像诊断原发性肺癌的应用研究

对３０例原发性肺癌患者分别应用９９ｍＴｃ（Ⅴ）－ＤＭＳＡ及９９ｍＴｃ－ＭＩＢＩ显像。结果表明：９９ｍＴｃ（Ⅴ）－ＤＭＳＡ、９９ｍＴｃ－ＭＩＢＩ敏感度分别为９０％、７６．７％。两者结合显像阳性率为９６．７％。鳞状上皮细胞癌对９９ｍＴｃ（Ⅴ）－ＤＭＳＡ及９９ｍＴｃ－ＭＩＢＩ摄取程度比其它类型的肺癌高。     

Identification of radiation treatment of wheat （Triticum aestivum. L）and rice （Oryza sativa. L） samples using thermoluminescence of contaminating minerals

Food irradiation is gaining popularity worldwide and this technology is important to improve quality and reduce the post harvest losses of food. Because of the rapid commercialization of irradiated foods throughout the world, compliance of different regulations relating to use of technology in different countries and demand of consumers for clear labelling of irradiated foods, there is need for the development of analytical methods to detect radiation treatment of food. Among several methods studied so far, thermoluminescence （TL） is an important method that can be used to find out the irradiation history of food that contain even a very minute amount of dust particles. In this study, the irradiated and unirradiated wheat and rice samples were analyzed using the TL method. The samples were purchased from the local market of Peshawar and irradiated to radiation doses of 0.5 and 1.0 kGy using Co-60 gamma irradiator at the Nuclear Institute for Food and Agriculture （NIFA）, Peshawar. The mineral contaminants were isolated by jet water, ultrasonic treatment, and density gradient. TL glow curves of the isolated minerals from irradiated and unirradiated samples were recorded between the temperature ranges of 50-500℃ using a TL reader. Generally, the glow curves for irradiated samples showed much higher TL intensities （TL1） than the unirradiated samples. The results were normalized by rerradiation of mineral samples to gamma-ray dose of 1.0 kGy followed by determination of the second glow curves （TL2）. The ratio of the area of first glow curve to that of second glow curve （TL1/TL2） was calculated for selected temperature intervals and compared with the recommended values for unirradiated and irradiated samples. Finally, the shapes of the glow curves for irradiated and unirradiated samples were also analyzed. On the basis of these results （comparison of TL-intensities, TL1/TL2 ratios and shapes of the glow curves）, all the irradiated and unirradiated samples of wheat and rice were unequivocally identified.     

有效探测面积大于1000 cm2的正比计数器测量系统性能测试

为对自制的活性面积高达1 000 cm²的大面积源进行表面发射率定值,同时作为现有2πα、2πβ表面发射率标准装置能力的扩充,研制了一套内置式大面积2π多丝正比计数器测量系统,并利用活性区直径为8 mm的²⁴¹Am点源及活性区面积为10 cm×15 cm的大面积²⁴¹Am和⁹⁰Sr-⁹⁰Y源对其进行计量学性能测试。结果表明：计数器内计数响应均匀性优于±0.4%,有效探测面积达1 400 cm²;所得²⁴¹Am源高压坪曲线的坪长为1 400 V,坪斜为0.27%/100 V,坪区内计数变化为0.87%;⁹⁰Sr-⁹⁰Y源高压坪曲线的坪长为300 V,坪斜为0.75%/100 V,坪区内计数变化为0.80%;10次测量重复性好于0.4%,8 h内短期稳定性好于0.3%,1 a内长期稳定性好于0.8%。     

Preparation of Zn/TiO2 powder and its photocatalytic performance for oxidation of P-nitrophenol

Zn-doped TiO2 catalysts were prepared using a sol-gel method and characterized by XPS,UV-Vis, BET, XRD in this study. Under the irradiation of simulant sunlight, the photocatalytic activity for the degradation of p-nitrophenol was studied too. After irradiation for 2.5 h, the degradation percentage of p-nitrophenol could rise to more than 80 %. The results showed that the spectrum absorption band edge of Zn/TiO2 powder does not broaden obviously comparing with pure TiO2 powder. Zinc exists as Zn （11）. When calcined at 973 K, there is a new phase as ZnTiO3 in Zn/TiO2 catalyst. The order of photocatalytic activity of Zn/TiO2 catalysts calcined at different temperatures for p-nitrophenol is 773 K 〉 673 K 〉 873 K 〉 573 K 〉 973 K and the photocatalytic activity of Zn/TiO2 catalyst calcined at 773 K is better than TiO2 catalysts heated at the same temperature, and outclasses that of commercial TiO2 catalyst. It also showed that the photocatalytic degradation of p-nitrophenol follows first-order kinetics under the irradiation of simulant sunlight.     

Current status of radiation therapy for prostate cancer

Radiotherapy for the treatment of prostate cancer has been extensively explored in the past. Along with the comprehensive understanding of the biology of prostate cancer and rapid advances in terms of technology, the out- come of treatment for the patients with prostate cancer has improved. The authors review radiotherapy as the primary treatment for the disease, with particular emphasis on the technological advances from both the radiobiological and radiophysics aspects. Nonconventional fractionated irradiation like hyper- or hypo-fractionation has been imple- mented in the clinic, the final results still need to be confirmed in the future. Technological advances like IMRT, IGRT, in the last two decades have significantly improved the delivery of external radiotherapy to the prostate. This has re- sulted in an overall increase in the total dose that can be safely delivered to the prostate, which has led to modest im- provements in the biochemical outcome. However, establishing the standard therapy for prostate cancer remains con- troversial. It is hoped that the next decades will bring continued advances in the development of biologicals that will further improve current clinical outcomes.     

Interaction between uranium and humic acid (Ⅰ): Adsorption behaviors of U(Ⅵ) in soil humic acids

The adsorption behaviors of uranium on three soil humic acids (HAs), which were extracted from soils of different depths at the same site, were investigated under various experimental conditions. The adsorption results showed that U(Ⅵ) in solutions can be adsorbed by the three soil HAs, with the order of FHA (HA from 5 m depth of soil) ＞SHA (HA from the surface) ＞THA (HA from 10 m depth of soil) for adsorption efficiency in each desirable condition, and the adsorption reached equilibrium in about 240 min. Although the maximum adsorption efficiency was adsorption could be described with Langmiur isotherm or Freundlich isotherm equation. The L/S (liquid/solid, mL/g)ratio and pH were important factors influencing the adsorption in our adsorption system besides uranium concentration. The adsorption efficiency decreased with the increase of the L/S ratio and pH at the pH range of 2.0-3.0 for SHA and THA or 2.5 - 6.0 for FHA. However, no significant difference in adsorption of U(Ⅵ) was observed at the experimental temperature. All the results implied that humic substances have different characteristics in samples even collected at the same site.     

水平管内含空气蒸汽强制对流冷凝换热模型研究

为研究含空气蒸汽在水平管内强制对流冷凝换热特性,基于对传热传质过程的分析,建立了管内为环状流与波状流条件下的流动冷凝换热模型。从潜热、显热和液膜3个环节对整个换热过程进行建模,最终得到计算局部冷凝换热系数的理论关系式。模型预测结果与实验数据的对比表明,二者相对偏差在±20%以内,验证了该换热模型的准确性与适用性。通过进一步的研究发现：从换热管入口至出口,随着冷凝的进行,管内换热主要热阻由液膜热阻向气液界面的凝结热阻转变;主流气体对流换热过程基本可忽略。     

Information for authors

<正>1.NUCLEAR SCIENCE AND TECHNIQUES(NST),a bimonthly journal,is devoted to all aspects of nuclear science and technology,theoretical or experimental.Its special interest lies in the subjects of synchrotron radiation science and technology;low energy accelerators,radiation technology and applications;radiochemistry,radiopharmaceuticals and nuclear medicine;nuclear electronics and instrumen-     

PLASMA SCIENCE AND TECHNOLOGY AUTHOR INDEX TO VOLUME 16(2014)

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Web Services interface of SSRF archive data analysis system

Accelerator database stores various static parameters and real-time data of accelerator. SSRF (Shanghai Synchrotron Radiation Facility) adopts relational database to save the data. We developed a data retrieval system based on XML Web Services for accessing the archive data. It includes a bottom layer interface and an interface applicable for accelerator physics. Client samples exemplifying how to consume the interface are given. The users can browse, retrieve and plot data by the client samples. Also, we give a method to test its stability. The test result and performance are described.     

Investigations on landmine detection by BF3 detector

Experiments were carried out to investigate the possible use of neutron backscattering for the detection of polyethylene (PE) sample buried in the soil. In detection of landmine by neutrons, the neutron detector and its shield play an important role. In this paper, the effects of graphite, heavy water, polyethylene and boric acid moderators on the flux of back scattered neutrons were investigated. We have also experimentally verified the effect of BF3 detector shield and obtained good agreement with theory.