LINEAR DETECTOR FOR X-RAY ABSORPTIOMETRY

两个领域，双能X射线吸收法和数字X射线摄影， 在过去，他们的诊断能力发展迅速， 由于图像处理和半导体技术的改进， 探测器 虽然扇形光束吸收仪（FBA），如来自Hologic和 月球，可以成像整个骨架或任何子区域，并提供 定量骨密度测量，身体成分，和几何 尺寸，它们无法产生诊断上有用的射线照相 质量图像。 高分辨率、准线性医生将增强 通过将射线照相质量成像添加到现有的FFA中， 能力，否则不可用的组合。 所提出的探测器将具有100 μ M的FWHM患者分辨率， 单位DQE，扫描速率为10厘米/秒，16位动态范围。 包括一种新的闪烁体结构， 设计的CCD，它可以生产在任意长度与各种 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Monte Carlo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 散射 这将支持第二阶段改进的制造方法， 替代闪烁体材料研究，优化CCD 开发，并建立一个原型探测器兼容的 现有的FBA 拟议商业应用：存在潜在应用 在需要X射线照相的地方。Hologic公司是专门 有兴趣使用这个探测器来增强他们现有的扇形光束 骨密度计线其他医学例子包括 X射线照相术、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。也会有一个广泛的 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.