助手标题  
全文文献 工具书 数字 学术定义 翻译助手 学术趋势 更多
查询帮助
意见反馈
   照射野数目 的翻译结果: 查询用时:0.029秒
图标索引 在分类学科中查询
所有学科
肿瘤学
眼科与耳鼻咽喉科
更多类别查询

图标索引 历史查询
 

照射野数目
相关语句
  “照射野数目”译为未确定词的双语例句
     Influence on dose distribution by beam direction and beam number in inverse intensity-modulated for nasopharyngeal carcinoma
     鼻咽癌逆向调强计划中照射野方向和照射野数目对剂量分布的影响
短句来源
     Objective To implement simultaneous integrated boost intensity-modulated radiotherapy(SIB-IMRT)plans for upper esophageal carcinoma and investigate the dose profiles of tumor and electively treated region and the dose to organs at risk (OARs).
     目的对上段食管癌实施同时整和加量调强放射治疗(simultaneousintegratedboostintensity-modulatedradiationtherapy,SIB-IMRT)计划,研究肿瘤及预防照射区的剂量分布情况和危及器官受量,并比较不同照射野数目对剂量分布的影响。
短句来源
     For coplanar beam arrangements, the dose distribution in the target , rectum and bladder was not improved as the beam number increased from 5 to 7, though with the dose to the femoral head decreased, showing better dose conformity to the target. Five field and 6 field plans almost revealed the same situation.
     对于共面射野计划,当射野数目由5增至7时,增加照射野数目对靶区、直肠和膀胱剂量分布没有改善且会增加治疗时间,但能降低股骨头受量,靶区剂量均匀性、适合度指数提高,5、6野情况大致相同。
短句来源
  相似匹配句对
     of geometrical figures from number;
     从数目产生几何图形;
短句来源
     Influence on dose distribution by beam direction and beam number in inverse intensity-modulated for nasopharyngeal carcinoma
     鼻咽癌逆向调强计划中照射野方向和照射野数目对剂量分布的影响
短句来源
     The number of cells was counted.
     并计数了细胞的数目
短句来源
     Conclusions:The beam angle and the number of beams have influence upon dose distribution, the dose distribution would be improved for large volume target with the increment of beam number.
     结论:照射野方向和照射野数目对剂量分布有影响,增加照射野数目可以改善体积较大的病灶的剂量分布。
短句来源
     Improvement of Irradiation Fields in the Treatment of Cerebellum Tumor
     小脑肿瘤放疗照射野的改进
短句来源
查询“照射野数目”译词为用户自定义的双语例句

    我想查看译文中含有:的双语例句
例句
为了更好的帮助您理解掌握查询词或其译词在地道英语中的实际用法,我们为您准备了出自英文原文的大量英语例句,供您参考。
  number of beam
This introduces the possibility of finding a topology with less complexity in terms of the number of beam connections.
      
A reference cut with a bandsaw and three laser cuts with an increasing number of beam passes (4, 16, 64) were performed on each sample.
      
We analyse the coupling as a function of the focal ratio of the incident beams and the number of beam widths off-axis through which the coupler is extended, and describe a simple construction method to realise a compact and effective design.
      
Algorithms and results of solution of a number of beam bending problems are given.
      
The spectra show that the number of beam electrons within each single pulse follows the Poisson statistics and agree well with the theoretically expected spectra.
      
更多          


305 cases of short-term death after 60Co external irradiation of esophageal carcinomas in our hospital from 1964 to 1978 were reported. The total death rate (<1-year) was 59.92% (305/509). It was higher in the aged group (over 50) than in the younger (below 50). However there was no significant difference among the different sites of the tumor, the X-ray types and number of the irradiation fields (P>0.05). The length of the lesion, the tumor doses of irradiation the metastatic lymph node in supraclavicular fossa...

305 cases of short-term death after 60Co external irradiation of esophageal carcinomas in our hospital from 1964 to 1978 were reported. The total death rate (<1-year) was 59.92% (305/509). It was higher in the aged group (over 50) than in the younger (below 50). However there was no significant difference among the different sites of the tumor, the X-ray types and number of the irradiation fields (P>0.05). The length of the lesion, the tumor doses of irradiation the metastatic lymph node in supraclavicular fossa might correlate with the short-term death rate closely. The optima) dose might be 60 to 70 Gy.It showed a lower short term death rate among the cases treated by preoperation irradation than those by radiation alone (P<0.01) in this series.

本文收集了放疗科1964年5月至1978年12月间收治509例食管癌中在近期死亡的305例资料,对其近期死亡有关临床因素进行了分析。指出近期死亡与病变所在部位,X线分型、照射野数目无明显相关;年龄大、病灶长是中晚期食管癌放疗后近期死亡的主要因素。≥8cm的病灶因有外侵或转移,局部放疗常难获得治愈,有锁骨上淋巴结转移者更应慎重选择。给与合适剂量(60~70Gy),采取术前放疗等综合治疗措施,可望减少放疗后的近期死亡和提高生存期。

Objective To implement simultaneous integrated boost intensity-modulated radiotherapy(SIB-IMRT)plans for upper esophageal carcinoma and investigate the dose profiles of tumor and electively treated region and the dose to organs at risk (OARs).Methods SIB-IMRT plans were designed for two patients with upper esophageal carcinoma.Two target volumes were predefined:PTV1,the target volume of the primary lesion,which was given to67.2Gy,and PTV2,the target volume of electively treated region,which was given...

Objective To implement simultaneous integrated boost intensity-modulated radiotherapy(SIB-IMRT)plans for upper esophageal carcinoma and investigate the dose profiles of tumor and electively treated region and the dose to organs at risk (OARs).Methods SIB-IMRT plans were designed for two patients with upper esophageal carcinoma.Two target volumes were predefined:PTV1,the target volume of the primary lesion,which was given to67.2Gy,and PTV2,the target volume of electively treated region,which was given to50.4Gy.With the same dose-volume constraints,but different beams arrangements(3,5,7,or9equispaced coplanar beams),four plans were generated.Indices,including dose distribution,dose volume histogram (DVH)and conformity index,were used for comparison of these plans.Results The plan with three intensity-modulated beams could produce good dose distribution for the two target volumes.The dose conformity to targets and the dose to OARs were improved as the beam number increased.The dose distributions in targets changed little when the beam number increased from7to9.Conclusions Five to seven intensity-modulated beams can produce desirable dose distributions for simultaneous integrated boost(SIB)treatment for upper esophageal carcinoma.The primary tumor can get higher equivalent dose by SIB treatments.It is easier and more efficient to design plans with equispaced coplanar beams.The efficacy of SIB-IMRT remains to be determined by the clinical outcome.

目的对上段食管癌实施同时整和加量调强放射治疗(simultaneousintegratedboostintensity-modulatedradiationtherapy,SIB-IMRT)计划,研究肿瘤及预防照射区的剂量分布情况和危及器官受量,并比较不同照射野数目对剂量分布的影响。方法对2例上段食管癌的原发灶和预防照射区进行SIB-IMRT计划设计。定义2个靶区:PTV1为需要加量照射的原发灶靶区,给予67.2Gy;PTV2为预防照射区,给予50.4Gy的剂量。设计4个计划,采用共面、360度范围等角度分布的照射野,野数分别为3、5、7、9,4个计划使用相同的剂量-体积约束条件进行逆向优化。比较这4个计划的剂量分布、剂量体积直方图(dosevolumehistogram,DVH)、适合度指数等指标。结果3个调强照射野即可使2个靶区获得满意的剂量分布。随着照射野数目的增加,靶区剂量均匀性、适合度指数提高,危及器官受量减小。当照射野数由7增加到9时,剂量分布没有改善。结论5~7个调强照射野即可使上段食管癌的同时整和加量(simultaneousintegratedboost,SIB)治疗...

目的对上段食管癌实施同时整和加量调强放射治疗(simultaneousintegratedboostintensity-modulatedradiationtherapy,SIB-IMRT)计划,研究肿瘤及预防照射区的剂量分布情况和危及器官受量,并比较不同照射野数目对剂量分布的影响。方法对2例上段食管癌的原发灶和预防照射区进行SIB-IMRT计划设计。定义2个靶区:PTV1为需要加量照射的原发灶靶区,给予67.2Gy;PTV2为预防照射区,给予50.4Gy的剂量。设计4个计划,采用共面、360度范围等角度分布的照射野,野数分别为3、5、7、9,4个计划使用相同的剂量-体积约束条件进行逆向优化。比较这4个计划的剂量分布、剂量体积直方图(dosevolumehistogram,DVH)、适合度指数等指标。结果3个调强照射野即可使2个靶区获得满意的剂量分布。随着照射野数目的增加,靶区剂量均匀性、适合度指数提高,危及器官受量减小。当照射野数由7增加到9时,剂量分布没有改善。结论5~7个调强照射野即可使上段食管癌的同时整和加量(simultaneousintegratedboost,SIB)治疗获得理想的剂量分布。原发肿瘤可以获得比常规分割高的等效剂量。共面、等角度分布的照射野设计简单、效率高。SIB-IMRT治疗的疗效还有待于临床的结果。

Objective To describe a method which can optimize beam weight, wedge angle, and wedge orientation simultaneously by combining the super-omni wedge (SOW) concept with the function of beam weight optimization provided by a commercial treatment planning system. Methods A five-step procedure including: Step 1. To set up four 60° nominal wedged beams for each beam direction with the wedge orientations of "LEFT", "IN", "RIGHT", "OUT", respectively; Step 2. To define an optimization request, including an optimization...

Objective To describe a method which can optimize beam weight, wedge angle, and wedge orientation simultaneously by combining the super-omni wedge (SOW) concept with the function of beam weight optimization provided by a commercial treatment planning system. Methods A five-step procedure including: Step 1. To set up four 60° nominal wedged beams for each beam direction with the wedge orientations of "LEFT", "IN", "RIGHT", "OUT", respectively; Step 2. To define an optimization request, including an optimization goal and constraints. We use CMS Focus treatment planning system which allows us to choose "maximize target dose" or "minimize critical structure dose" as the optimization goal, and to set minimum target dose, maximum target dose, and maximum average dose of critical structures as constraints. Then the optimization process was launched as step 3; Step 4. To evaluate the plan using isodose distributions and dose-volume histograms. If acceptable, go to Step 5. Otherwise, go back to Step 2 to modify optimization constraints; and Step 5. Transform the SOW beams into the beams of omni wedge so as to reduce the number of to-be-delivered beams. Results This procedure was found being able to demonstrate successfully in two clinical cases: an esophageal carcinoma and a brain tumor. Compared with manually designed plan, the optimized plan showed better dose homogeneity in the targets and better sparing of the critical structures. Conclusions This method described is able to optimize beam weights while working with a treatment planning system. Not only does it improve treatment plans' quality, but also shorten the treatment planning process.

目的 运用超全向楔形板概念 ,结合计划系统优化照射野权重的功能 ,来同时优化照射野权重、楔形板角度和方向。方法 分 5个步骤进行 :第一步是根据超全向楔形板概念 ,在每个照射野方向布置 4个 6 0°楔形板照射野 ,楔形方向分别是“LEFT”、“IN”、“RIGHT”、“OUT” ;第二步是根据每个计划系统优化权重功能的特点 ,定义优化问题 (包括优化的目标函数和约束条件 ) ;第三步是启动优化过程 ;第四步是当优化问题有解 ,并且评价优化结果满意时 ,进到第五步 ,否则回到第二步修改优化条件 ;第五步是将超全向楔形板的照射野变换为全向楔形板的照射野 ,以减少照射野数目 ,继而减少治疗时间。结果 将该方法运用到 1例食管癌和 1例脑瘤。与手工计划相比 ,计划靶区剂量更均匀 ,危及器官受照剂量更低。结论 对于复杂布野情况 ,运用该方法不仅可以提高计划质量 ,而且可以缩短计划设计时间。

 
<< 更多相关文摘    
图标索引 相关查询

 


 
CNKI小工具
在英文学术搜索中查有关照射野数目的内容
在知识搜索中查有关照射野数目的内容
在数字搜索中查有关照射野数目的内容
在概念知识元中查有关照射野数目的内容
在学术趋势中查有关照射野数目的内容
 
 

CNKI主页设CNKI翻译助手为主页 | 收藏CNKI翻译助手 | 广告服务 | 英文学术搜索
版权图标  2008 CNKI-中国知网
京ICP证040431号 互联网出版许可证 新出网证(京)字008号
北京市公安局海淀分局 备案号:110 1081725
版权图标 2008中国知网(cnki) 中国学术期刊(光盘版)电子杂志社