EPITAXIAL FILM SCINTILLATORS FOR DIGITAL RADIOGRAPHY

描述：研究人员建议测试开发一种 基于镥铝石榴石（铈掺杂）的透明闪烁体， 牙科X射线照相术，如其摘要中进一步描述的： “我们建议开发一种基于外延的数字X射线照相传感器， 沉积层的镥铝石榴石（Lu 3Al 5 O 12，LuAG），用 三价铈。本发明提供了一种沉积高质量的 类似的材料（特别是掺钕钇铝石榴石）已经被 专为激光和其他要求苛刻的光学应用而开发。而且 LuAG 3单晶的光谱和闪烁特性已经 经过调查，认为合适。这种材料的密度为6.7 g/cm 3和在10和64 keV之间的平滑吸收（无K边缘），更好地 比CsI或Gd 2 O2 S，常规标准，并具有理想的特性 与牙科X射线源匹配检测器层的厚度将 在100到200微米之间，第一阶段将寻求确认 这种外延膜的可制造性和闪烁性能。超出 第一阶段，我们看到层分割成独立的图片元素， 消除串扰并最大化对比度和分辨率， 挑战，但外延技术可以提供独特的优势， 实现这样的分割。我们认为，拟议的工作将导致 比现有的任何X射线闪烁体材料都要好。" 拟议商业应用：不可用

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