Gated Optical Detectors-Dose Guided Radiotherapy

一个新的自选通系统，具有4个检测通道和所有信号处理已经交付，并执行规格，消除了校准稳定性的问题。校准稳定性现在为1%。NRL正在开发新的光纤，其剂量响应将更加均匀，并且将基于100微米光纤而不是当前的400微米模型。海军研究实验室已经撤回了对这个项目的支持。作为替代方案，我们已经获得了补偿切伦科夫辐射的闪烁探测器。该系统（于2019年4月交付）的探测器直径为1 mm，长度为1 mm。虽然不像OSL探测器那么小，但应足以精确测量4mm直径立体定向锥的输出。该探测器的另一个优点是它与我们的IBA Blue Phantom II扫描水体模兼容。由于其他紧迫的工作，我们预计将在2019年秋季开始测量。

A new self-gated system with 4 detection channels and all signal processing has been delivered and performs to specifications, eliminating the problem of calibration stability. Calibration stability is now 1%. New fibers are being developed by NRL that will be more uniform in dose response and will be based on a 100 micron optical fiber rather than the current 400 micron model. The Naval Research Laboratory has withdrawn their support for this project. As an alternative, we have acquired a scintillation detector that compensates for Cerenkov radiation. This system (which was delivered in April, 2019) has a detector that has a 1mm diameter with a 1mm length. While not as small as the OSL detector, it should be adequate for accurate output measurements of a 4mm diameter stereotactic cone. The additional advantage of this detector is that it is compatible with our IBA Blue Phantom II scanning water phantom. Due to other pressing work, we expect to begin measurements in the Fall of 2019.