在碳离子疗法中使用短寿命正电子发射器进行几秒钟范围验证
Caterina Cuccagna1, Giuseppe Battistoni2, Maria Giuseppina Bisogni3
1TERA Foundation, Novara, Italy; DPNC, Université de Genève, Geneva, Switzerland.
概括
射线内阳位子发射断层扫描 (PET) 能够在子疗法中精确的体内范围监测. 这项研究表明,在处理之前,短时间的照射是可行的,以验证碳离子束的范围.
科学领域:
- 医学物理 医学物理
- 核医学就是核医学.
- 微粒疗法是一种微粒疗法.
背景情况:
- 射线内阳位子发射断层扫描 (PET) 对于在子疗法中进行体内范围监测至关重要.
- 精确的范围验证确保了有效和安全的辐射传递.
研究的目的:
- 为了证明在碳离子疗法中使用短时间的辐射运行来验证预处理范围的可行性.
- 评估INSIDE内束PET探测器用于快速范围监测的效率.
主要方法:
- 在CNAO设施用220 MeV/u碳离子束对PMMA目标进行辐射.
- 在0.6秒辐射后使用INSIDE内束PET探测器获取消灭巧合.
- 实验结果与FLUKA蒙特卡洛模拟结果的比较.
主要成果:
- 重建的正电子发射核分布与FLUKA蒙特卡罗预测对3·10^7碳离子的预测非常相匹配.
- 足够的放射核生产允许使用6秒的测量以1毫米的准确度确定平均离子束范围.
- 灭光后获得的数据使得可用于各种加速度器时间结构的快速校准方法成为可能.
结论:
- 使用内射PET进行短时间的照射是可行的,以有效地验证碳离子束射程.
- 内部探测器系统提供了准确和快速的范围监测能力.
- 开发的方法为在不同的子疗法环境中进行范围验证提供了一种多功能方法.
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