在日本的放射治疗设施的地理接入
Yuhei Koike1,2, Satoaki Nakamura1,2, Hodaka Numasaki3
1Department of Radiology, Kansai Medical University, 2-5-1 Shinmachi, Hirakata, Osaka, 573-1010, Japan.
Journal of radiation research
|February 26, 2026
概括
先进的放射治疗 (RT),如强度调节的RT和支架疗法,增加了旅行时间,为日本的患者创造了显著的地理障碍. 这不成比例地影响了农村和岛屿人口,突出了晚期癌症治疗的不平等现象.
科学领域:
- 医学物理 医学物理
- 辐射疗法 辐射疗法
- 医疗保健服务研究 医疗服务研究
背景情况:
- 每日照射疗法 (RT) 需要良好的地理可达性,以遵守治疗.
- 先进的RT方式 (IMRT,支架疗法) 集中在城市地区,但患者的旅行负担在全国范围内没有得到很好的量化.
研究的目的:
- 进行日本第一个全国性,模式分层评估,对日本的RT地理接入进行评估.
- 量化与不同RT方式相关的患者旅行负担.
- 识别那些无法获得先进的技术技术服务的地区.
主要方法:
- 利用开源路由机和高分辨率的1公里网状中心点数据,为176,964个位置提供数据.
- 计算的驾驶时间到最近的外部光束RT (EBRT),IMRT和支臂疗法设施.
- 生成了高分辨率的"惩罚地图",以评估高级模式的增量旅行时间.
主要成果:
- 平均行程时间:EBRT 6.48 分钟,IMRT 8.26 分钟,支臂疗法 14.06 分钟.
- 人口面临不良接入 (≥120分钟):EBRT的0.24%,Brachytherapy的0.48%.
- 确定了山区和岛屿地区的"新进入不良"区域,用于先进的RT.
结论:
- 模式要求在RT接入方面造成了显著的地理不平等,尽管国家EBRT基础设施强大.
- 先进的RT接入挑战不成比例地影响特定地区和人口.
- 结果支持基于证据的空间资源优化,以减少老龄化和行动能力有限的患者的旅行负担.
相关概念视频
02:59Biological Effects of Radiation
All radioactive nuclides emit high-energy particles or electromagnetic waves. When this radiation encounters living cells, it can cause heating, break chemical bonds, or ionize molecules. The most serious biological damage results when these radioactive emissions fragment or ionize molecules. For example, α and β particles emitted from nuclear decay reactions possess much higher energies than ordinary chemical bond energies. When these particles strike and penetrate matter, they produce ions...
01:17Radiation: Applications
The average temperature of Earth is the subject of much current discussion. Earth is in radiative contact with both the Sun and dark space; it receives almost all its energy from the radiation of the Sun and reflects some of it into outer space. Dark space is very cold, about 3 K, so Earth radiates energy into it. For instance, heat transfer occurs from soil and grasses, the rate of which can be so rapid that frost can occur on clear summer evenings, even in warm latitudes.
The average...
The average...
01:05Absorption of Radiation
The rate of heat transfer by emitted radiation is described by the Stefan-Boltzmann law of radiation: