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

项目概要：用于数字化的新型高分辨率闪烁X射线探测器 口腔 从传统胶片到数字X射线探测器的转变， 牙科X射线成像在许多领域的改进， 时间，改善物流，甚至降低辐射剂量率。一个显著 然而，数字X射线成像仍然存在缺点，这是当前的数字X射线成像 用于牙齿成像的检测器具有次优的空间分辨率性能。的 数字探测器的图像分辨率通常低于以前所达到的分辨率 使用传统的胶片。这就带来了一个问题，当它是必要的图像小 用于牙科领域内的各种诊断和程序的功能。NGS Detectors，LLC与Lawrence Livermore National的合作伙伴合作 实验室（LLNL）和布朗大学开发了一种高分辨率的结构化 可与小像素间距CCD和CMOS光学耦合的闪烁体 光电探测器芯片，以实现高达 幅度优于目前牙科使用的最先进的数字X射线探测器 显像 这种新颖的设计通过使用 几何约束原理。有序光学微通道，直径为 用高量子效率的聚合物渗透小至5微米。 该STTR第1阶段建议进一步开发几何约束的通风机， 将它们耦合到小像素间距CDD或CMOS光电探测器芯片， 最大化口腔内牙科X射线成像的空间分辨率性能。第一 步骤是证明当耦合到 CCD和CMOS传感器将显著提高空间分辨率。第二 第一步是表征量子效率和光子产额， 该模型为比较剂量率提供了基础。最后，光学工程 将对改进进行测试，以最大限度地提高量子效率并最小化剂量 这是使用检测器系统成像所需的。

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.