EPITAXIAL FILM SCINTILLATORS FOR DIGITAL RADIOGRAPHY

用于数字射线照相的外延薄膜闪烁体

• 批准号: 2774715
• 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: 1999
• 资助国家: 美国
• 起止时间: 1999-04-01 至 2000-03-31
• 项目状态: 已结题
• 来源: https://reporter.nih.gov/project-details/2774715
• 关键词: aluminum; bioimaging /biomedical imaging; biomedical equipment development; cerium; dental radiography; digital imaging; scintillation cameras; silicates

DESCRIPTION: The investigators propose to test the feasibility of developing a transparent scintillator based on lutetium aluminum garnet (cerium doped) for dental X-ray radiography, as further described by their abstract: "We propose to develop a digital radiography sensor, based on an epitaxially deposited layer of lutetium aluminum garnet (Lu3Al5O12, LuAG) activated with tripositive cerium. The technology for depositing high-quality layers of similar materials (notably Nd-doped yttrium aluminum garnet) has already been developed for laser and other demanding optical applications. Moreover, the spectroscopic and scintillation properties of LuAG3 single crystals has already been investigated and found appropriate. This material has a density of 6.7 g/cm3 and a smooth absorption (free of K edges) between 10 and 64 keV, better than CsI or Gd2O2S, the conventional standards, and has ideal characteristics for a match to dental X-ray sources. The thickness of the detector layer will be between 100 and 200 microns, and Phase I will seek to confirm the fabricability and scintillation performance of such epitaxial films. Beyond Phase I we see segmentation of the layer into independent picture elements, to eliminate crosstalk and maximize contrast and resolution, as the major challenge, but epitaxial technology may well offer unique advantages in achieving such segmentation. We believe that the proposed work will result in better X-ray scintillator materials than any now available." PROPOSED COMMERCIAL APPLICATION: NOT AVAILABLE

描述：研究人员建议测试开发一种 基于镥铝石榴石（掺铈）的透明闪烁体 牙科 X 射线照相，其摘要进一步描述： “我们建议开发一种基于外延技术的数字射线照相传感器 镥铝石榴石沉积层 (Lu3Al5O12, LuAG) 活化 三正铈。沉积高质量层的技术 类似的材料（特别是掺钕钇铝石榴石）已经 专为激光和其他要求苛刻的光学应用而开发。此外， LuAG3单晶的光谱和闪烁特性已经 经调查并认为合适。该材料的密度为6.7 g/cm3 和 10 至 64 keV 之间的平滑吸收（无 K 边缘），更好 优于CsI或Gd2O2S等常规标准，具有理想的特性 用于与牙科 X 射线源匹配。检测器层的厚度将 介于 100 至 200 微米之间，第一阶段将寻求确认 这种外延膜的可制造性和闪烁性能。超过 第一阶段，我们看到该层被分割成独立的图像元素， 消除串扰并最大限度地提高对比度和分辨率，作为主要 挑战，但外延技术很可能提供独特的优势 实现这样的细分。我们相信拟议的工作将导致 比现有任何材料都更好的 X 射线闪烁体材料。” 拟议的商业应用：不可用