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

用于低剂量、高分辨率牙科 DR 成像的半导体探测器

• 批准号: 10544863
• 负责人: JAMES F CHRISTIAN
• 金额: $ 25.96万
• 依托单位: RADIATION MONITORING DEVICES, INC.
• 依托单位国家: 美国
• 财政年份: 2022
• 资助国家: 美国
• 起止时间: 2022-09-16 至 2023-08-31
• 项目状态: 已结题
• 来源: https://reporter.nih.gov/project-details/10544863
• 关键词: Adult; Bromides; Child; Chronic Disease; Computers; Dental; Dental Radiography; Dental caries; Dentists; Deposition; Detection; Devices; Digital Radiography; Digital X-Ray; Discipline; Dose; Electrodes; Engineering; Exposure to; Film; Goals; Image; Imaging technology; Investigation; Mammography; Medical; Methods; Patients; Performance; Phase; Population; Positioning Attribute; Procedures; Process; Public Health; Radiation Dose Unit; Radiation Monitoring; Reproducibility; Research; Resolution; Risk; Roentgen Rays; Selenium; Semiconductors; Signal Transduction; Silicon; System; Techniques; Technology; Testing; Thallium; Thick; Tooth structure; United States; Universities; Work; X-Ray Medical Imaging; base; contrast imaging; cost; density; detector; digital; high resolution imaging; imager; imaging capabilities; imaging detector; imaging system; improved; innovation; microCT; monitoring device; process optimization; professor; prototype; radiological imaging; receptor; response; scale up; sensor

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.

研究及相关其他项目信息-项目概要/摘要 龋齿是一个持续的公共卫生问题，影响了美国人口的很大一部分。几乎所有 在美国，成年人被认为有患蛀牙的危险，对于儿童来说， 慢性病虽然广泛和常规使用，但始终存在对患者暴露于X射线的担忧 在放射成像过程中-儿童尤其需要关注这一问题。 辐射监测设备（RMD）提出开发一种改进的数字X射线探测器，用于牙科 X射线摄影将保留当前数字技术的所有优点，同时提高灵敏度， 减少患者剂量。该设备将涉及两种技术的集成-硅基成像阵列 和半导体X射线转换层。硅的能力是很好理解的，与CCD和CMOS 在牙科成像中得到广泛应用的设备。半导体转换层的应用越来越多， 创新和挑战的概念。 RMD的创新是将常用的CsI或无定形硒X射线受体替换为 半导体溴化铊（TlBr）。TlBr将提供更大的剂量效率和更高的图像 对比度牙科成像的优点是牙医将获得高分辨率的图像， 习惯了，但现在对病人的剂量要低得多。 在第一阶段，RMD将开发制造高质量TlBr薄膜的工艺，并比较 技术，以现有的探测器薄膜，以证明TlBr的优越性。工作计划将包括电影 沉积，研究与TlBr一起工作的兼容电极层，识别和 缓解出现的技术挑战的战略，并完成广泛的电气和物理 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， KA Imaging CMOS ROIC上的成像探测器，并充分表征完整的探测器系统。的结果 该研究将是一种新的数字X射线摄影探测器，具有可比或更好的图像质量， 比目前使用的探测器更低的患者剂量。