MASDA-X A FLAT PANEL IMAGER FOR DIGITAL FLUOROSCOPY

该提案要求支持开发一种新的成像技术， MASDA-X多元素非晶合金的制造技术 用于X射线的硅探测器阵列，第一个平板数字成像 MASDA-X阵列将由薄的、扁平的 具有高达30 × 30平方厘米成像表面的面板。 成像表面 由一个有规律的二维图像组成 像素 每个像素由一个氢化非晶硅组成 耦合到单个多晶硅场效应的光电二极管 晶体管，其允许成像阵列进行自扫描。 这些 像素将以100微米的间距间隔开。 MASDA-X 阵列，当与荧光屏和读出器一起使用时 电子也将在该项目中开发，将允许高 高帧率下的信噪比荧光透视成像。 的 该项目的成功完成将导致创建一个 X射线图像增强器（XRII）系统的替代技术 这是目前进行荧光透视检查的主要手段 显像 这一根本性的进步将使许多方面发生革命性的变化 荧光透视。 平板成像器的轮廓大约为 与胶片盒的厚度相同。 这种巨大的压缩 与XRII系统相比， 这些设备将直接使医生和其他人员受益， 各种临床环境。 除了提供高分辨率之外， 高信噪比、数字图像以及高信噪比的前景 便携式透视装置，平板成像器将消除 遮蔽眩光的问题和XRII系统的失调问题。 在 此外，它们将不受杂散磁场的影响， 从而有助于定量分析 体积流量 因此，保证质量的成像没有杂光， 失真和失谐将是可能的。 的固态性质 成像表面意味着它可以被设计成任何临床上 有利的配置（例如，4：3用于胸部成像）。 最后，当前 平板技术的发展意味着 更大的成像面板，高达60 × 60平方厘米，可能是可用的 在这个十年结束之前。 毫无疑问，这项技术将导致 在改进现有的和创造新的放射技术 最终为患者提供更好的护理。

This proposal requests support for the development of a new imaging technology allowing the creation of MASDA-X, Multi-element Amorphous Silicon Detector Array for X-rays, the first flat-panel, digital imaging system for x-ray fluoroscopy, MASDA-X arrays will consist of thin, flat panels having up to a 30 by 30 cm2 imaging surface. The imaging surface consists of a regular two-dimensional pattern of individual imaging pixels. Each pixel consists of a single hydrogenated amorphous-silicon photodiode coupled to a single polycrystalline-silicon field-effect transistor which allow the imaging array to be self-scanning. These pixels will be spaced at a pitch as fine as 100 microm. The MASDA-X arrays, when used in conjunction with phosphor screens and with readout electronics also to be developed in this project, will permit high signal-to-noise fluoroscopic imaging at high frame rates. The successful completion of this project will result in the creation of a replacement technology for the x-ray image-intensifier (XRII) systems which are currently the primary means for performing fluoroscopic imaging. This fundamental advance will revolutionize numerous aspects of fluoroscopy. Flat panel imagers will have a profile approximately the same as that of a film cassette. This tremendous compaction compared to XRII systems will lead to far less bulky an cumbersome equipment which will directly benefit physicians and other personnel in a variety of clinical environments. Besides offering high resolution, high signal-to-noise, digital images as well as the prospect of high portable fluoroscopic units, flat panel imagers will eliminate the problem of veiling glare and the detuning problems of XRII systems. In addition, they will be unaffected by stray magnetic fields, and will not suffer distortion thereby assisting quantitative analysis such as blood volume flow. Thus, quality-assured imaging free from veiling glare, distortion, and detuning will be possible. The solid-state nature of the imaging surface means that it may be designed in any clinically advantageous configuration (eg. 4:3 for chest imaging). Lastly, current developments in the flat panel technologies imply that considerably larger imaging panels, up to 60 by 60 cm2, are likely to be available before the end of the decade. Undoubtedly, this technology will result in improvement of existing and the creation of new radiologic techniques ultimately resulting in better care for patients.