Radiation Protection and Environment最新文献_第8页

Dosimetric comparison of coplanar intensity-modulated radiotherapy, noncoplanar intensity-modulated radiotherapy, and volumetric arc therapy planning technique in hippocampal-sparing whole-brain radiotherapy 共面调强放疗、非平面调强放疗和体积弧治疗计划技术在保留海马全脑放疗中的剂量比较

Radiation Protection and Environment Pub Date : 2021-01-01 DOI: 10.4103/rpe.rpe_48_20

Ajay Sharma, P. Bagdare, P. Chadha, P. Shree, M. Gupta, R. Chauhan, I. Jaiswal, K. Talapatra

{"title":"Dosimetric comparison of coplanar intensity-modulated radiotherapy, noncoplanar intensity-modulated radiotherapy, and volumetric arc therapy planning technique in hippocampal-sparing whole-brain radiotherapy","authors":"Ajay Sharma, P. Bagdare, P. Chadha, P. Shree, M. Gupta, R. Chauhan, I. Jaiswal, K. Talapatra","doi":"10.4103/rpe.rpe_48_20","DOIUrl":"https://doi.org/10.4103/rpe.rpe_48_20","url":null,"abstract":"The aim of this study was to compare the dosimetric parameters of Co-planar Intensity modulated radiotherapy (C-IMRT), non-coplanar (NC-IMRT), and volumetric arc therapy (VMAT) planning technique in hippocampal sparing (HS) whole brain radiotherapy (WBRT). Fifteen patients of brain metastasis (BM) treated with hippocampal sparing whole-brain palliative radiation were selected for this study. C-IMRT, NC-IMRT and VMAT plans were generated for the comparison. Generated plans were evaluated based on planning target volume (PTV) coverage, conformity index (CI), homogeneity index (HI), beam-on time (BOT) and dose delivered to organs at risk (OARs) for the prescribed dose (PD) of 30 Gy in 10 fractions. Statistically significant difference was found in PTVD95%, PTVmax, HI, BOT, MU, Dmax of the brainstem, Dmean of eyes, Dmax of lenses and Dmax, Dmean and D2% of the bilateral hippocampus. However, a non-significant difference was observed in CI, D100% of both the hippocampus, Dmax of the optic chiasm, optic nerves, and Dmax of eyes in all the three planning techniques. Considering the superior plan quality, both NC-IMRT and VMAT are better than the C-IMRT planning technique. Based on beam-on time and delivery efficiency VMAT is found to be superior to both the C-IMRT and NC-IMRT technique. Doses to OARs are very well within the limits in all the three planning techniques.","PeriodicalId":32488,"journal":{"name":"Radiation Protection and Environment","volume":"44 1","pages":"22 - 27"},"PeriodicalIF":0.0,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46364242","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

II. Dr. Srikumar Banerjee: Some fond reminiscences 二、斯里库马尔·班纳吉博士：一些美好的回忆

Radiation Protection and Environment Pub Date : 2021-01-01 DOI: 10.4103/rpe.rpe_17_21

M. Iyer

引用次数: 0

Planning, preparedness, and response to nuclear/radiological emergency 核/辐射紧急情况的规划、准备和反应

Radiation Protection and Environment Pub Date : 2021-01-01 DOI: 10.4103/rpe.rpe_9_21

S. Saindane, S. Murali, S. Dhole, N. Karmalkar

{"title":"Planning, preparedness, and response to nuclear/radiological emergency","authors":"S. Saindane, S. Murali, S. Dhole, N. Karmalkar","doi":"10.4103/rpe.rpe_9_21","DOIUrl":"https://doi.org/10.4103/rpe.rpe_9_21","url":null,"abstract":"Planning and preparedness for response to any kind of radiation emergency are an evolving and dynamic assignment with expertise developed over a period of time. The lessons learnt in this specialized field are from the past/reported emergencies, guiding documents available on response to radiation emergencies in national/international arena, worldwide security scenario on the use of nuclear and other radioactive material including attempted malicious usage and requirements of national/international regulatory framework. The above sources help us to evolve the planning, preparedness, build response capability, and periodic revision in overall capabilities. Response planning is to mitigate the consequences of nuclear emergency – a low probability, high impact scenario at the sites/general public living in the vicinity of operating nuclear facilities, and radiological emergency – a moderate probability, low impact scenario at any locations in public domain due to typical initiating scenarios – although could be different, most of our radiation emergency response centers, developed, revised to respond to any such challenges and response procedures are evolved, set. This article on planning, preparedness for response to radiation emergency describes the present level of planning and response capability by Department of Atomic Energy, India.","PeriodicalId":32488,"journal":{"name":"Radiation Protection and Environment","volume":"44 1","pages":"47 - 53"},"PeriodicalIF":0.0,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44366750","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: 1

Studies on natural and fallout radioactivity mapping of the proposed Mithivirdi Atomic Power Project Site in Bhavnagar District, Gujarat, India 印度古吉拉特邦Bhavnagar地区拟建的Mithivirdi原子能项目场址的自然和沉降放射性测绘研究

Radiation Protection and Environment Pub Date : 2021-01-01 DOI: 10.4103/rpe.rpe_5_21

A. Patra, T. Jaison, S. Wagh, M. Jha, I. Saradhi, A. Kumar

引用次数: 1

Study of ambient gamma dose levels at national atmospheric research laboratory, Gadanki, India 印度加丹基国家大气研究实验室对环境伽马剂量水平的研究

Radiation Protection and Environment Pub Date : 2021-01-01 DOI: 10.4103/rpe.rpe_62_20

K. Kumar, T. Prasad, Nagaraja Kamsali

引用次数: 1

Assessment of 235U and 234U concentration in confiscated uranium samples by alpha- and gamma-ray spectrometry techniques 用α和γ射线光谱技术评估没收铀样品中的235U和234U浓度

Radiation Protection and Environment Pub Date : 2020-07-01 DOI: 10.4103/rpe.rpe_30_20

Amar N. Pant, Anilkumar S. Pillai, N. Krishnan, A. Verma

引用次数: 0

Shielding designing of 241Am-Be neutron source housing experiment and Monte Carlo simulation 241Am-Be中子源外壳屏蔽设计实验与蒙特卡罗模拟

Radiation Protection and Environment Pub Date : 2020-07-01 DOI: 10.4103/rpe.rpe_54_20

A. Bakshi, S. Chatterjee, S. Dawn, Mudit Beck, T. Selvam

引用次数: 0

Spatial mapping and radiometric survey of high background radiation areas in Southern Tamil Nadu, India 印度南部泰米尔纳德邦高本底辐射区的空间测绘和辐射测量

Radiation Protection and Environment Pub Date : 2020-07-01 DOI: 10.4103/rpe.rpe_47_20

K. Baskaran, K. Arunachalam

{"title":"Spatial mapping and radiometric survey of high background radiation areas in Southern Tamil Nadu, India","authors":"K. Baskaran, K. Arunachalam","doi":"10.4103/rpe.rpe_47_20","DOIUrl":"https://doi.org/10.4103/rpe.rpe_47_20","url":null,"abstract":"Southern Tamil Nadu has placer deposits, which is rich in minerals like zircon, garnet, monazite and rutile containing with radionuclides of U, Th and their decayed products. The present study is to identify the high background radiation areas in the regions of South west–east coast of Tamil Nadu. The ground radiometric survey was conducted in different seasons using portable radiation survey meter and global positioning system. Total of 137 observation spots were marked from 5 blocks for repeat measurements. Then calculated for the outdoor effective external terrestrial dose to the public residing in these blocks. The survey found average absorbed dose rate of block in this order 3>2> 4>1>5 (1394, 641, 247, 225, 167 nGy/h, respectively). From the data, a spatial mapping was performed for seasonal variation and interpolated for the unknown areas of dose rate. The outdoor effective dose to the public was found to be 1.66> 0.79>0.31>0.27>0.20 mSv/y with respective blocks. Conclusion: The dose to public was found to be lower, when compared with other high background radiation areas in the world. Therefore, there is no significant radiological risks to the public from natural radiation exposure.","PeriodicalId":32488,"journal":{"name":"Radiation Protection and Environment","volume":"43 1","pages":"162 - 170"},"PeriodicalIF":0.0,"publicationDate":"2020-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44933877","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: 3

Ingestion dose due to 226Ra, 228Ra, and 40K in the plant origin food materials grown around BARC, Visakhapatnam 维萨卡帕特南BARC周围种植的植物源食品材料中226Ra, 228Ra和40K的摄入剂量

Radiation Protection and Environment Pub Date : 2020-07-01 DOI: 10.4103/rpe.rpe_37_20

P. Savitri, T. Murty, J. Sudhakar, N. Krishna, S. Sahoo, A. Gupta, A. Kumar

引用次数: 1

Occurrence of radon contamination in ground water samples of Amritsar city, Punjab, India 印度旁遮普省阿姆利则市地下水样品中氡污染的发生

Radiation Protection and Environment Pub Date : 2020-07-01 DOI: 10.4103/rpe.rpe_28_20

Sumit Sharma, K. Kaur, Amanpreet Kaur, Ajay Kumar

引用次数: 2