Journal of Nuclear Research and Applications最新文献_第5页

Design and Construction of a 2.45 GHz Microwave Electrothermal Thruster 2.45 GHz微波电热推力器的设计与构造

Journal of Nuclear Research and Applications Pub Date : 2022-06-01 DOI: 10.24200/jon.2022.1016

S. Fazelpour, H. Sadeghi, A. Chakhmachi, R. Amrollahi

引用次数: 0

Calculation of Gallium-68 Dose Factors for [68Ga] DOTATATE Injected Patients: A Comparison with OLINDA Database [68Ga] DOTATATE注射患者镓-68剂量因子的计算:与OLINDA数据库的比较

Journal of Nuclear Research and Applications Pub Date : 2022-06-01 DOI: 10.24200/jon.2022.1018

S. Karimkhani, H. Yousefnia, R. Faghihi, P. Gramifar, M. Parishan

{"title":"Calculation of Gallium-68 Dose Factors for [68Ga] DOTATATE Injected Patients: A Comparison with OLINDA Database","authors":"S. Karimkhani, H. Yousefnia, R. Faghihi, P. Gramifar, M. Parishan","doi":"10.24200/jon.2022.1018","DOIUrl":"https://doi.org/10.24200/jon.2022.1018","url":null,"abstract":"[68Ga] DOTATATE as a radiolabeled tracer is used for in vivo detection of neuroendocrine tumors in the PET/CT examinations. This study aims to calculate S-values in various organs in a voxelized-based Monte Carlo simulation approach for each patient individually. PET/CT images of 9 patients suspected of neuroendocrine cancer were acquired 60 minutes after injection of [68Ga] DOTATATE. After reshaping and registering CT images to the size of PET images, GATE/GEANT4 Monte Carlo (MC) toolkit was used with two inputs of CT images as voxelized attenuation map and PET images as a voxelized activity map for the calculation of the different organs dose. Voxelized dose maps were extracted in the target organs for different source organs. S-value volume histogram and absolute S-values based on the MIRD formalism were calculated. The highest S-values were observed for spleen, bladder, kidneys, liver, pituitary, and the lung with 6.26E-05 ± 1.47E-05, 5.17E-05 ± 3.08E-05, 3.41E-05 ± 7.68E-06, 2.08E-05 ± 4.12E-06, 1.62E-05 ± 5.74E-06 and 8.47E-06 ± 2.47E-06 mGy/MBq.S, respectively. The difference between the amounts of the calculated S-values and those presented in OLINDA software is mainly related to the anatomical difference of the patients with the standard phantom in OLINEDA software. This study showed that patient-specific dosimetry is necessary to calculate S-values.","PeriodicalId":324615,"journal":{"name":"Journal of Nuclear Research and Applications","volume":"8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123403827","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Evaluation of fast fission factor in a typical pool type research reactor 典型池型研究堆快裂变因子的评价

Journal of Nuclear Research and Applications Pub Date : 2022-01-08 DOI: 10.24200/jon.2022.1010

M. Arkani, S. Khakshournia

引用次数: 0

Mechanical properties of 316L stainless steel samples fabricated by selective laser melting and comparison with other manufacturing methods 选择性激光熔化制备316L不锈钢试样的力学性能及其与其他制造方法的比较

Journal of Nuclear Research and Applications Pub Date : 2022-01-08 DOI: 10.24200/jon.2022.1009

A. Sazgar, V. Gholizadeh, J. Sherafati

{"title":"Mechanical properties of 316L stainless steel samples fabricated by selective laser melting and comparison with other manufacturing methods","authors":"A. Sazgar, V. Gholizadeh, J. Sherafati","doi":"10.24200/jon.2022.1009","DOIUrl":"https://doi.org/10.24200/jon.2022.1009","url":null,"abstract":"Selective laser melting (SLM) is an additive manufacturing technique in which a laser beam with a high energy density is used to melt a metal powder substrate. Although this technique has several advantages, including the possibility of fabricating complex metal components quickly, there are concerns about the mechanical properties of the parts produced by the SLM method. This is study aims to ensure the achievement of acceptable mechanical properties including yield stress, tensile strength, and elongation percentage compared to conventional manufacturing methods. For this purpose, samples of 316L stainless steel were printed using the SLM machine. These samples and samples of annealed 316L bar were tested under same conditions and by the same equipment. Despite the large differences in microscopic structure, no significant differences were observed in mechanical properties. Also, the obtained results were compared with the results related to the sample made by the DLD additive manufacturing method, which is similar to SLM in terms of energy source and raw materials. The result represents that the mechanical strength and microhardness of the sample produced by the SLM technique are higher than the other samples, and the elongation percentage is within the desirable range. The yield stress, tensile strength, and elongation are respectively 595Mpa, 696Mpa, and 34.5%, all of which are within the acceptable range required by the standards for such samples. The investigation of the microstructure shows a complete austenitic cellular structure without considerable solidification defects. Overall, the SLM additive manufacturing is a reliable process to produce 316L stainless steel parts in terms of mechanical properties.","PeriodicalId":324615,"journal":{"name":"Journal of Nuclear Research and Applications","volume":"16 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-01-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115045037","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Assessment of pollutant elements content in ambient air dust of Khuzestan province 胡齐斯坦省环境空气粉尘中污染物元素含量评价

Journal of Nuclear Research and Applications Pub Date : 2022-01-08 DOI: 10.24200/jon.2022.1012

Z. Akbari, O. Kakaouee, R. Shahbazi, J. Darvishi Khatooni, M. Mashal

引用次数: 0