使用J-PET扫描仪检测质子束治疗中的范围转移:一个患者模拟研究
Karol Wiktor Brzezinski1, Jakub Baran2, Damian Borys3
1IRIS group, IFIC, Parque Científico, Catedrático José Beltrán, 2, Paterna, Valencia, 46071, SPAIN.
Physics in medicine and biology
|June 9, 2023
概括
雅吉洛尼亚PET (J-PET) 系统使用蒙特卡洛模拟有效监测质子疗法范围偏差. 这项技术可以准确预测范围的变化,从而提高治疗质量评估.
科学领域:
- 医学物理 医学物理
- 核仪器仪表 核仪器仪表 核仪器仪表
- 放射治疗 物理 物理
背景情况:
- 质子疗法提供精确的剂量输送,但需要精确的范围监测.
- 质子范围的偏差可能会损害治疗疗效和患者的安全.
- 采用塑料闪器的Jagiellonian PET (J-PET) 技术是范围监控的一个潜在的经济有效的解决方案.
研究的目的:
- 研究使用J-PET实时监测质子疗法范围的可行性.
- 评估J-PET在检测规定的和交付的质子范围之间的差异方面的准确性.
- 开发基于J-PET数据的质子范围偏差的预测模型.
主要方法:
- 详细的蒙特卡洛模拟95名患者在Bronowice的Cyclotron中心接受质子疗法.
- 模拟患者定位和霍恩斯菲尔德单位校准中的差异.
- 使用双层 (室内) 和三层 (光束内) J-PET 几何.
- 开发了线性预测模型,将重建的PET活动转移与质子范围偏差相关联.
主要成果:
- 重建的PET活动图显示与剂量范围偏差一致.
- 线性预测模型显示出很好的匹配:r^2 = 0.84 (室内) 和0.75 (光束内).
- 剩余的标准误差是精确的,低于1毫米 (0.33毫米在室内,0.23毫米在光束中).
结论:
- 在各种临床场景中,J-PET系统对质子范围的变化具有很高的敏感性.
- 开发的预测模型准确地预测了质子范围的偏差,有助于评估治疗质量.
- 这项研究强调了治疗期间J-PET成像技术在改善质子疗法结果方面的潜力.
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