相关实验视频

Updated: Jul 6, 2025

Dosimetry for Cell Irradiation using Orthovoltage 40-300 kV X-Ray Facilities

Dosimetry for Cell Irradiation using Orthovoltage 40-300 kV X-Ray Facilities

Published on: February 20, 2021

对于FLASH放射生物实验的新型UHDR大电压X射线源的剂量测量表征

Nolan Esplen¹, Luca Egoriti^2,3, Thomas Planche²

¹Physics and Astronomy, University of Victoria, Victoria, V8P 5C2, Canada.

Scientific reports

|January 9, 2024

概括

研究人员开发了一种用于超高剂量率 (UHDR) 放射生物学研究的新型辐射平台. 该系统成功地在10MV的UHDRX射线束中传输,使得在小鼠模型中进行新的临床前研究.

科学领域:

医学物理医学物理
辐射瘤学辐射瘤学
临床前研究临床前研究

背景情况:

闪光辐射疗法利用超高剂量率 (UHDR) 获得潜在的治疗益处.
超高频传输系统的表征对于推动放射生物学的研究至关重要.
三公司开发了一种新的平台,用于10 MV的X射线UHDR辐射.

研究的目的:

开发和描述一种用于UHDR FLASH放射生物研究的新型辐射平台.
为了证明使用单一系统提供UHDR和常规 (CONV) 剂量速率的可行性.
评估该平台是否适合进行临床前研究,包括在小鼠模型中进行肺部总辐射.

主要方法:

开发和描述一个10 MV的X射线照射平台.
使用膜剂量计和非拦截束监测装置来测量剂量速率.
在C57Bl/6J小鼠身上进行胸部照射,使用UHDR和CONV模式,目标剂量为15和30 Gy.

主要成果:

该平台成功地提供了UHDR和CONV辐射.
获得的名义剂量速率为UHDR的82.6 Gy/s,CONV模式的4.40 × 10^-2 Gy/s.
场大小>40 Gy/s可以达到4.1厘米深度,适合小鼠肺部辐射.
在健康的小鼠模型中,第一次展示了10MV的UHDRX射线辐射.

结论:

一个新的辐射平台,用于10 MV的UHDR FLASH放射生物学研究,已经成功开发和表征.
该平台可以同时提供UHDR和CONV辐射模式.
这项技术有助于在相关的生物模型中对UHDR放射治疗进行临床前研究.

更多相关视频

Irradiator Commissioning and Dosimetry for Assessment of LQ α and β Parameters, Radiation Dosing Schema, and in vivo Dose Deposition

Irradiator Commissioning and Dosimetry for Assessment of LQ α and β Parameters, Radiation Dosing Schema, and in vivo Dose Deposition

Published on: March 11, 2021

Characterization of Recombination Effects in a Liquid Ionization Chamber Used for the Dosimetry of a Radiosurgical Accelerator

Characterization of Recombination Effects in a Liquid Ionization Chamber Used for the Dosimetry of a Radiosurgical Accelerator

Published on: May 9, 2014

相关概念视频

Biological Effects of Radiation

Biological 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...

X-ray Imaging

X-ray Imaging

German physicist Wilhelm Röntgen (1845–1923) was experimenting with electrical current when he discovered that a mysterious and invisible "ray" would pass through his flesh but leave an outline of his bones on a screen coated with a metal compound. In 1895, Röntgen made the first durable record of the internal parts of a living human: an "X-ray" image (as it came to be called) of his wife’s hand. Scientists worldwide quickly began their own experiments with...