...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Journal of Research of the National Institute of Standards and Technology >New National Air-Kerma-Strength Standards for ~(125)I and ~(103)Pd Brachytherapy Seeds
【24h】

New National Air-Kerma-Strength Standards for ~(125)I and ~(103)Pd Brachytherapy Seeds

机译：〜（125）I和〜（103）Pd近距离放射治疗种子的新的国家空气比释动能标准

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

The new U.S. measurement standard for the air-kerma strength from low-energy photon-emitting brachytherapy seed sources is formally described in detail. This instrument-based standard was implemented on 1 January 1999, with its salient features and the implications of differences with the previous standard given only through a series of informal communications. The Wide-Angle Free-Air Chamber (WAFAC) is specially designed to realize air kerma from a single-seed source emitting photons with energies up to about 40 keV, and is now used to measure the wide variety of seeds used in prostate-cancer therapy that has appeared in the last few years. For the two ~(125)I seed models that have been subject to both the old and new standards, the new standard reduces the air-kerma strength by 10.3 %. This change is mainly due to the removal of the influence on the measurement of the Ti K x rays produced in the source encapsulation, a component with no clinical significance.
机译：正式详细描述了针对低能量光子近距离放射治疗种子源的空气比释动能强度的新美国测量标准。这项基于工具的标准于1999年1月1日实施，其显着特征以及与先前标准的不同之处仅通过一系列非正式交流提供。广角自由空气室（WAFAC）是专门设计用于从单种子源中实现空气比释动能，该单种子源发射能量高达约40 keV的光子，现已用于测量前列腺癌中使用的多种种子最近几年出现的一种疗法。对于同时受旧标准和新标准约束的两个〜（125）I种子模型，新标准将空气动骨力降低了10.3％。这种变化主要是由于消除了对源封装中产生的Ti K x射线的测量的影响，该封装没有临床意义。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号