Semiconductor detector for low-dose, high-resolution dental DR imaging

研究及相关其他项目信息-项目摘要/摘要 龋齿是一个持续存在的公共健康问题，影响着美国很大一部分人口。几乎所有人 在美国，成年人被认为有患龋齿的风险，对儿童来说，这是一种常见的 慢性病。虽然被广泛和常规地使用，但人们总是担心患者暴露在X光下 在放射成像过程中--这一问题在儿童中尤其严重。 辐射监测设备(RMD)建议开发一种改进的牙科数字X射线探测器 它将保留当前数字技术的所有优势，同时提高灵敏度和 减少病人的剂量。该设备将涉及两项技术的集成-基于硅的成像阵列 以及半导体X射线转换层。硅的能力是很好理解的，使用电荷耦合器件和芯片。 在牙科成像领域有广泛应用的设备。半导体转换层的应用越多 这一概念具有创新性和挑战性。 RMD的创新是将常用的CSI或非晶态硒X射线接收器替换为 半导体溴化铊(TlBr.)TlBR将提供更高的剂量效率和更高的图像 对比度。牙科成像的优点是牙科医生将获得高分辨率的图像。 习惯了，但现在给病人的剂量要低得多。 在第一阶段，RMD将开发制造高质量TlBr膜的工艺，并比较 技术来证明TlBR的优越性。工作计划将包括胶片 沉积、兼容电极层的研究以与TlBR一起工作、鉴定和 缓解出现的技术挑战的战略，以及完成广泛的电气和物理 用于测量X射线灵敏度和图像质量的测试。在第二阶段，RMD将优化工艺，制造X射线 KA IMAGING CMOSROIC上的成像探测器，充分表征了完整的探测器系统。其结果是 这项研究将是一种新的数字射线照相探测器，具有相当或更好的图像质量和显著的 患者剂量比目前使用的探测器低。

Research & Related Other Project Information – Project Summary/Abstract Dental caries is a persistent public health problem that impacts a large fraction of the US population. Nearly all adults in the United States are considered at risk of developing tooth decay, and for children it is a common chronic disease. Though widely and routinely used, there are always concerns about patient exposure to X-rays during radiographic imaging – a concern especially heightened with children. Radiation Monitoring Devices (RMD) proposes to develop an improved digital X-ray detector for dental radiography that will retain all the benefits of a current digital technology, while improving sensitivity and reducing patient dose. The device will involve the integration of two technologies - silicon based imaging arrays and semiconductor x-ray conversion layers. The silicon capabilities are well understood, with CCD and CMOS devices well established in dental imaging. The application of a semiconductor conversion layer is the more innovative and challenging aspect of the concept. RMD's innovation is to replace the commonly used CsI or amorphous selenium X-ray receptors with the semiconductor thallium bromide (TlBr). TlBr will provide a much greater dose efficiency and higher image contrast. The advantage to dental imaging is that dentists will get the high resolution images that they are accustomed to, but now with a much lower dose to the patient. During Phase I, RMD will develop the processes to fabricate high quality films of TlBr and compare the technology to existing detector films to demonstrate the superiority of TlBr. The work plan will encompass film deposition, investigation of compatible electrode layers to work in conjunction with the TlBr, identification and mitigation strategies of technical challenges that arise, and completion of a wide range of electrical and physical tests to gauge X-ray sensitivity and image quality. In Phase II RMD will optimize the processes, fabricate X-ray imaging detectors on KA Imaging CMOS ROICs and fully characterize a complete detector system. The result of this research will be a new digital radiography detector with comparable or better image quality and significantly lower patient dose than currently used detectors.