LINEAR DETECTOR FOR X-RAY ABSORPTIOMETRY

两个领域，双能X射线吸收测量和数字射线照相， 在过去，他们的诊断能力迅速进步 十年，图像处理和半导体技术的进步 探测器。而扇形波束吸收计(FBA)，如来自霍洛奇和 月球，可以成像整个骨架或任何分区并提供 定量骨密度测量、身体成分和几何形状 尺寸，它们不能产生诊断有用的射线照片 高质量的图像。一个高分辨率、准线性的医生会增加 现有的FFA通过在其现有的基础上增加射线质量成像 功能，这是一种原本不可用的组合。 建议的探测器将具有100微米半高宽患者分辨率， 单位DQE，扫描速率为10厘米/秒，16位动态范围。 由一种新的闪烁体结构组成，该结构连接到一个特殊的 设计了ccd，可以生产任意长度的各种 闪烁体材料。 第一阶段将通过生产小型CSI探测器来展示可行性 结构，并将测量结果与蒙特卡罗模型进行比较。空间 性能应仅受像素间康普顿和弹性的限制 散布。这将支持第二阶段改进的制造方法， 交替闪烁体材料研究，优化电荷耦合器件 开发，并构建一个与 现有FBA。 拟议的商业应用：存在潜在的应用 任何需要X光照片的地方。霍洛奇，Inc.专门 有兴趣使用该探测器来增强他们现有的扇束 骨密度仪测线。其他医学例子包括普通 放射摄影术、数字减影血管造影术和计算机地形图， 包括微型计算机断层扫描。还会有一个宽阔的 各种非医学成像应用。

Two fields, dual-energy x-ray absorptiometry and digital radiography, have advanced rapidly in their diagnostic capabilities in the past decade due to improvement in image processing and semiconductor detectors. While fan-beam absorptiometers (FBAs), as from Hologic and Lunar, can image an entire skeleton or any sub-area and provide quantitative bone density measures, body composition, and geometric dimensions, they cannot produce diagnostically useful, radiographic quality images. A high resolution, quasi-linear doctor would augment existing FBAs by adding radiographic quality imaging to their present capabilities, an otherwise unavailable combination. The proposed detector would have a 100 microM FWHM patient resolution, unity DQE, scan rates to 10 cm/sec, and 16 bit dynamic range. Comprised of a novel scintillator structure coupled to a specially designed CCD, it could be produced in arbitrary lengths with a variety of scintillator materials. Phase I will show feasibility by producing small CsI detector structures and comparing measurements to Monte Carlo models. Spatial performance should be limited only by interpixel Compton and elastic scattering. This will support Phase II improved fabrication methods, alternate scintillator material investigations, optimized CCD development, and building a prototype detector compatible with an existing FBA. PROPOSED COMMERCIAL APPLICATION: Potential applications exist wherever x-ray radiographs are required. Hologic, Inc. is specifically interested in using this detector to enhance their existing fan-beam bone densitometer line. Other medical examples include general radiography, digital subtraction angiography, and computer topography, including micro-computed tomography. There would also be a wide variety of non-medical imaging applications.