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：调查人员提议测试开发一种 锂铝石榴石(掺Ce)透明闪烁体 牙科X射线照相术，如其摘要进一步描述的： 我们建议开发一种基于外延的数字射线成像传感器 用活化剂活化的锂铝石榴石(Lu3Al5O12，LuAG)沉积层 三阳性的Ce3+。用于沉积高质量层的技术 类似的材料(特别是掺钕的铝榴石)已经被 专为激光和其他要求苛刻的光学应用而开发。此外， LuAg3单晶的光谱和闪烁性质已经 已被调查并发现是适当的。这种材料的密度为6.7 G/cm~3和10到kev之间的平滑吸收(无K边)，较好 比CSI或Gd2O2S等常规标准具有理想的特性 与牙科X射线源匹配。探测器层的厚度将 在100到200微米之间，第一阶段将寻求确认 这种外延薄膜的可制备性和闪烁性能。超越 阶段I我们看到将层分割成独立的像素，以 消除串扰，最大限度地提高对比度和分辨率 挑战，但外延技术很可能在 实现这样的分割。我们相信，拟议的工作将导致 比目前可用的任何材料都更好的X射线闪烁体材料。 建议的商业应用：不可用