Abstract The introduction of radiotherapy beam delivery with high spatial modulation, including spot-scanning proton therapy, calls for development of 3D dosimeters for patient-specific treatment verifications. Inherently reusable methods like optically stimulated luminescence (OSL) pose a potential way to introduce a clinically viable 3D-dosimetry solution. Here we present a characterization of the OSL properties of the well-known thermoluminescence material LiF:Mg,Cu,P (MCP). The characterization was performed by monitoring the wavelength-dispersed emission of continuous-wave stimulated MCP pellets. We show that OSL emission is observed under blue (460 nm) and green (532 nm) laser stimulation, while no OSL signal is seen in MCP under red (664 nm) laser stimulation. Long-wavelength fluorescence including accumulating radiophotoluminescence is very intense under blue stimulation and must be suppressed for continuous use of a future 3D-dosimetry system. An evaluation of the number of emitted photons is used to estimate a measurable dose range of 0.1–10 Gy, which prompts further research in the use of MCP for 3D OSL-based dosimetry.

中文翻译：

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LiF:Mg,Cu,P 的光学表征——面向 3D 光学受激发光剂量测定

摘要 引入具有高空间调制的放射治疗束，包括点扫描质子治疗，需要开发用于患者特定治疗验证的 3D 剂量计。固有可重复使用的方法，如光学受激发光 (OSL)，为引入临床可行的 3D 剂量测定解决方案提供了一种潜在的方式。在这里，我们介绍了著名的热释光材料 LiF:Mg,Cu,P (MCP) 的 OSL 特性的表征。通过监测连续波受激 MCP 颗粒的波长色散发射来进行表征。我们表明在蓝色 (460 nm) 和绿色 (532 nm) 激光刺激下观察到 OSL 发射，而在红色 (664 nm) 激光刺激下在 MCP 中没有看到 OSL 信号。长波长荧光包括累积的放射光致发光在蓝色刺激下非常强烈，必须抑制以继续使用未来的 3D 剂量测定系统。对发射光子数量的评估用于估计 0.1-10 Gy 的可测量剂量范围，这促使进一步研究使用 MCP 进行基于 3D OSL 的剂量测定。