一个快速的分析剂量计算方法,用于MRI引导的质子疗法
Alisha Duetschler1,2, Carla Winterhalter1, Gabriel Meier1
1Center for Proton Therapy, Paul Scherrer Institute, 5232 Villigen PSI, CH, Switzerland.
Physics in medicine and biology
|September 26, 2023
概括
一种新的GPU加速分析方法使得MRI导向放射治疗的快速和准确的质子剂量计算成为可能. 这种方法显著改善了在磁场中进行质子疗法的在线计划适应.
科学领域:
- 医学物理 医学物理
- 放射治疗技术 放射治疗技术
- 计算成像技术的成像
背景情况:
- 磁共振成像为放射治疗提供了创新的在线图像指导.
- 质子疗法越来越多地被认为是MR引导的治疗,需要快速剂量计算.
- 目前的蒙特卡洛 (MC) 对质子剂量的模拟是准确的,但在线适应需要大量的时间.
研究的目的:
- 为MR导向质子疗法开发一种高效的剂量计算方法.
- 创建一个基于GPU的快速分析算法,将磁场束偏移纳入其中.
- 为了实现在线计划调整所必需的快速剂量计算.
主要方法:
- 开发了一个基于GPU的分析算法,修改了射线造剂量计算.
- 在直角磁场中的光束轨迹的查看表 (LUT) 使用TOPAS-MC模拟生成.
- 该算法在各种材料和患者病例中与MC模拟进行了验证.
主要成果:
- 在分析和MC剂量分布之间取得了很好的一致性 (分毫米范围偏差,侧向偏移<2毫米).
- 观察到高马传递率 (2%/2毫米),与0T场景相比,即使在高密度材料中也是如此.
- 无论磁场强度如何,都保持了可比的治疗计划质量.
结论:
- 开发了一种新的,快速,准确的方法来计算磁场中的质子剂量.
- 该算法适用于在线计划适应在MR引导的质子疗法.
- 这一进步有助于在先进的放射治疗中改善治疗规划和治疗.
更多相关视频
08:34Proton Therapy Delivery and Its Clinical Application in Select Solid Tumor Malignancies
Published on: February 6, 2019
20.4K
07:57Positron Emission Tomography-based Dose Painting Radiation Therapy in a Glioblastoma Rat Model using the Small Animal Radiation Research Platform
Published on: March 24, 2022
2.8K
相关概念视频
01:24Magnetic Resonance Imaging
Magnetic resonance imaging (MRI) is a noninvasive medical imaging technique based on a phenomenon of nuclear physics discovered in the 1930s, in which matter exposed to magnetic fields and radio waves was found to emit radio signals. In 1970, a physician and researcher named Raymond Damadian noticed that malignant (cancerous) tissue gave off different signals than normal body tissue. He applied for a patent for the first MRI scanning device in clinical use by the early 1980s. The early MRI...
01:21Imaging Studies for Cardiovascular System IV: CMRI
Cardiovascular magnetic resonance imaging, or CMRI, is a non-invasive diagnostic test that employs a magnetic field and radiofrequency waves to create precise images of the heart and arteries. It provides comprehensive information about cardiac anatomy, function, perfusion, and tissue characterization without ionizing radiation.IndicationsCMRI diagnoses various heart conditions, including tissue damage from heart attacks, ischemic heart disease, myocarditis, aortic issues (tears, aneurysms,...