OPTICAL CERAMIC SCINTILLATORS FOR DIGITAL RADIOGRAPHY

用于数字放射摄影的光学陶瓷闪烁体

• 批准号: 2686226
• 负责人: ALEXANDER LEMPICKI
• 金额: $ 10万
• 依托单位: ALEM ASSOCIATES, INC.
• 依托单位国家: 美国
• 财政年份: 1998
• 资助国家: 美国
• 起止时间: 1998-05-01 至 1999-01-31
• 项目状态: 已结题
• 来源: https://reporter.nih.gov/project-details/2686226
• 关键词: X ray; biomedical equipment development; ceramics; chemical synthesis; dental radiography; digital imaging; method development; optics; rare earth element

We propose to develop a digital radiography sensor, based on a fully dense transparent optical ceramic consisting of Lu2O3 doped with an appropriate luminescent lanthanide ion. We have already fabricated, by hot pressing techniques, transparent samples doped with Eu or Tb, and demonstrated that their respective red and green emissions are strongly excited by X-ray irradiation. The oxide has a density of 9.5 g/cm3 and a smooth absorption (free of K edges) between 10 and 64 keV, better than any known material, such as CsI or Gd2O2S. It has ideal characteristics for a match to a dental X-ray tube. The thickness of the detector layer will be between 100 and 200 microns. The same material but of different geometrical configuration can be used for X-ray CAT scanners, also surpassing the performance of present day materials. Phase I will seek to improve ceramic fabrication (possibly exploring alternative sintering techniques) and to characterize performance (light output, decay, emission spectra). Beyond Phase I we see two different thrusts, one towards dental applications, the other towards CAT. Segmentation of the ceramic will be an important aspect. We believe that the proposed work will result in better X-ray scintillator materials than any now available. PROPOSED COMMERCIAL APPLICATION Because currently available X-ray phosphor screens cannot provide the necessary spatial resolution, medical radiography has been unable to tap the full potential of digital techniques for data acquisition and processing. The development of a material that can fill this need will revolutionize radiological techniques and greatly enhance their diagnostic power. The immediate market includes both dental and tomographic imaging, and potentially extends to virtually every X-ray machine now in use.

我们建议开发一个数字X射线照相传感器，基于一个完全 密集的透明光学陶瓷，由掺杂的Lu2O3组成 适当的发光灯笼离子。 我们已经捏造了 热按压技术，用欧盟或结核掺杂的透明样品，以及 证明他们各自的红色和绿色排放强烈 受X射线照射激发。 氧化物的密度为9.5 g/cm3，并且 光滑的吸收（不含k边缘）在10到64 KEV之间，比 任何已知的材料，例如CSI或GD2O2。 它具有理想的特征 与牙科X射线管进行匹配。 探测器层的厚度 将在100至200微米之间。 相同的材料，但不同 几何配置也可用于X射线猫扫描仪 超过当今材料的性能。 第一阶段将寻求 改善陶瓷制造（可能探索替代性烧结 技术）并表征性能（光输出，衰减， 发射光谱）。除了第一阶段，我们还看到了两个不同的推力，一个 走向牙科应用，另一个朝着猫。 分割 陶瓷将是一个重要方面。 我们相信拟议的工作 比现在的任何人都会产生更好的X射线闪烁材料 可用的。 拟议的商业应用 因为当前可用的X射线磷光屏幕无法提供 必要的空间分辨率，医学射线照相无法敲击 数字技术的全部潜力用于数据获取和 加工。 可以满足这种需求的材料的开发 革新放射学技术，并大大增强他们的 诊断能力。 直接市场包括牙科和 层析成像，并有可能扩展到几乎所有X射线 现在正在使用的机器。