ASYMMETRIC DUAL SCREEN CR CHEST IMAGING

描述（改编自申请人的摘要）：尽管在这方面有新的进展， 在医学成像中，投影射线照相术仍然是一种重要的工具， 用于检测肺部疾病，包括肺癌、间质性肺 疾病，以及各种其他胸部疾病。 常规 胸部X线摄影技术依赖于使用屏幕-胶片组合， 图像接收器。 各种数字射线照相技术已经被 开发和研究，以提高质量，显示，处理， 射线照相图像的利用和管理。 其中，计算 X射线照相术（CR）已经成为大规模X射线照相术的有希望的候选者。 数字X线摄影实现及与图像的集成 PACS（存档和通信系统），并已广泛用于床旁 重症监护室（ICU）的胸部成像。 然而，目前的CR系统， 由于其单屏幕设计，具有固有的较低检测量子 效率（DQE）和空间分辨率比传统的屏幕电影 技术. 部分由于这些原因，它们没有取代屏幕-胶片 胸部X线摄影技术对肺部疾病的初步诊断。 在这个项目中，申请人建议使用高分辨率（HR） 屏幕和标准分辨率（ST）屏幕，以同时获取 高分辨率前图像和标准分辨率、低噪声后图像。 这两个图像被叠加以构建改进的DQE的图像， 空间分辨率 这种技术被称为非对称 双屏CR技术，将进行优化和测试，使用实验 CR成像系统。 优化双屏CR图像的图像特性 将通过测量信号响应、MTF和噪声来表征 特性. 将进行一项全面的患者研究， 比较双屏CR技术与单屏CR， 传统的屏幕电影技术。 该项目的成功可能导致 在空间分辨率和DQE可与 比传统的屏-膜技术优越上级。 的 非对称双屏CR技术有助于CR质量的提升 胸部图像，并导致提高的准确性，为主要 肺部疾病的诊断。

DESCRIPTION (Adapted from Applicant's Abstract): Despite new advances in medical imaging, projection radiography continues to be an important tool for detection of pulmonary diseases including lung cancer, interstitial lung diseases, as well as a variety of other thoracic diseases. Conventional chest radiography techniques rely on the use of a screen-film combination as the image receptor. Various digital radiography techniques have been developed and investigated to improve the quality, display, processing, utilization and management of radiographic images. Among them, computed radiography (CR) has become a promising candidate for large scale implementation of digital radiography and integration with a Picture Archival and Communication System (PACS) and has found wide use in bedside chest imaging in intensive care units (ICUs). However, current CR systems, due to its single screen design, have intrinsically lower detection quantum efficiency (DQE) and spatial resolution than the conventional screen film techniques. Partially for these reasons, they have not replaced screen-film techniques in chest radiography for primary diagnosis of pulmonary diseases. In this project, the applicants proposed to use a high resolution (HR) screen and a standard resolution (ST) screen to simultaneously acquire a high resolution front image and a standard resolution, low noise back image. These two images are superimposed to construct an image of improved DQE and spatial resolution. This technique referred to as the asymmetric dual-screen CR technique, will be optimized and tested using an experimental CR imaging system. Image properties of the optimized dual-screen CR images will be characterized by measuring the signal response, MTF, and noise properties. A comprehensive patient study will be conducted to evaluate and compare the duel-screen CR techniques with the single-screen CR and conventional screen-film techniques. Success of this project could result in a CR technique with a spatial resolution and DQE comparable to or even superior than those of the conventional screen-film techniques. The asymmetric dual-screen CR technique should help upgrade the quality of CR chest images substantially and lead to improved accuracy for primary diagnosis of pulmonary diseases.