ASYMMETRIC DUAL SCREEN CR CHEST IMAGING

描述(改编自申请者摘要)：尽管在 医学成像、投影放射照相仍是一种重要工具 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。传统型 胸部摄影技术依赖于使用屏幕-胶片组合作为 图像感受器。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、加工、 射线影像的利用与管理。其中，计算 射线照相技术(CR)已成为一种很有前途的大规模应用 数字化射线成像技术的实现及其与图片的集成 档案与通信系统(PACS)在床边的广泛应用 重症监护病房(ICU)的胸部成像。然而，目前的CR系统， 由于其单屏设计，具有固有的较低的检测量 比传统屏幕胶片的效率(DQE)和空间分辨率 技巧。部分出于这些原因，它们还没有取代银幕电影 胸部摄影技术在肺部疾病初步诊断中的应用。 在本项目中，申请者建议使用高分辨率(HR) 屏幕和标准分辨率(ST)屏幕同时获取 高分辨率正面图像和标准分辨率、低噪声的背面图像。 将这两幅图像叠加，构建了改进的DQE图像和 空间分辨率。这种技术称为不对称 双屏CR技术，将使用试验性的优化和测试 CR成像系统。优化的双屏CR图像的图像特性 将通过测量信号响应、MTF和噪声来表征 属性。将进行全面的患者研究，以评估和 将双屏CR技术与单屏CR和 传统的银幕电影技术。这个项目的成功可能会导致 在空间分辨率和DQE与之相当或甚至相同CR技术中 比传统的屏幕胶片技术优越。这个 非对称双屏CR技术有助于提高CR质量 胸部图像显著，并导致提高的准确性，以初步 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.