Novel High-Resolution Scintillation X-ray Detectors for Digital Dentistry

项目总结：新型数字高分辨率闪烁X射线探测器 牙科 从传统胶片到数字X射线探测器的过渡导致了显著的 从减少等待时间到改善牙科X光成像的多个领域 时间，改善的后勤，甚至更低的辐射剂量率。一个重要的问题 然而，数字X射线成像的缺点仍然存在，即当前的数字X射线 用于牙科成像的探测器具有次优的空间分辨率性能。这个 数字探测器的图像分辨率往往低于以前达到的分辨率 使用传统的胶片。当有必要将图像小的时候，这会带来问题 牙科领域内各种诊断和程序的特点。NGS 探测器有限责任公司与劳伦斯·利弗莫尔国家律师事务所的合作伙伴 实验室(LLNL)和布朗大学已经开发出高分辨率的结构化 一种可与小像素间距的CCD和CMOS光耦合的闪烁体 光电探测器芯片实现高达数量级的空间分辨率性能 比目前最先进的用于牙科的数字X射线探测器更好的量级 成像。 这种新颖的设计将闪烁体固有的光子径向扩散降至最低 几何约束原理。直径为的有序光微通道 小到5微米，渗透着高量子效率的闪烁聚合物。 STTR1期计划进一步开发几何约束闪烁体和 将它们耦合到小像素间距的CDD或CMOS光探测器芯片，以便 最大限度地提高口腔内牙科X射线成像的空间分辨率性能。第一 步骤是展示当与闪烁体耦合时闪烁体微通道限制 Ccd和cmos传感器将显著提高空间分辨率。第二 步骤是表征量子效率和光子产额，并开发一种光学 该模型为比较剂量率提供了基础。最后，光学工程 将测试改进以最大化量子效率并将剂量降至最低 使用探测器系统进行成像所需的。

Project Summary: Novel High-Resolution Scintillation X-ray Detectors for Digital Dentistry The transition from traditional film to digital X-ray detectors has resulted in significant improvements across many areas for dental X-ray imaging ranging from decreased wait times, improved logistics and even lower radiation dose rates. One significant drawback remains with digital X-ray imaging however, which is that current digital X-ray detectors used in dental imaging have suboptimal spatial resolution performance. The image resolution for digital detectors is often inferior to what was previously achieved using traditional film. This poses a problem when it is necessary to image small features for various diagnoses and procedures within the field of dentistry. NGS Detectors, LLC, in collaboration with partners at Lawrence Livermore National Laboratories (LLNL) and Brown University have developed a high-resolution structured scintillator that can be optically coupled with small pixel-pitch CCD and CMOS photodetector chips to achieve spatial resolution performance up to an order of magnitude better than current state-of-the-art digital X-ray detectors used in dental imaging. This novel design minimizes photon radial spread inherent to scintillators by using principles of geometric confinement. Ordered optical microchannels with diameters as small as 5 microns are infiltrated with high quantum-efficiency scintillating polymers. This STTR Phase 1 proposes to further develop geometrically confined scintillators and couple them to small pixel-pitch CDD or CMOS photodetector chips in order to maximize spatial resolution performance for intraoral dental X-ray imaging. The first step is to demonstrate that microchannel confinement of scintillators when coupled to CCD and CMOS sensors will result in significant gains in spatial resolution. The second step is to characterize the quantum efficiency and photon yield and develop an optical model that provides a basis for comparing dose rates. Finally, optical engineering improvements will be tested to maximize the quantum efficiency and minimize the dose required for imaging using the detector system.