Achieving Routine Submillisievert CT Scanning: Report from the Summit on Management of Radiation Dose in CT
Achieving Routine Submillisievert CT Scanning: Report from the Summit on Management of Radiation Dose in CT
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DOI：
10.1148/radiol.12112265
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发表时间：
2012-08-01
期刊：
影响因子：
19.7
通讯作者：
Pettigrew, Roderic I.
中科院分区：
文献类型：
--
作者：
McCollough, Cynthia H.;Chen, Guang Hong;Pettigrew, Roderic I.
本特别报告介绍了2011年2月举行的计算机断层扫描(CT)辐射剂量管理问题首脑会议的共识，来自学术界、临床实践、行业以及监管和资助机构的与会者齐聚一堂，以确定将常规CT检查的有效剂量降至1毫西弗以下所需的步骤。峰会上讨论的最有前途的技术和方法包括X射线源、探测器、图像重建、降噪和后处理算法方面的创新和发展。获取原始投影数据和标准数据集以进行算法验证和优化显然是必要的，也需要新的、与临床相关的图像质量和诊断性能指标。目前商业上可用的技术，如自动曝光控制、管电势优化、光束整形滤光器和动态z轴准直器是重要的，并且迫切需要成功地实施这些方法的教育。其他正在变得广泛可用的方法，如迭代重建、降噪和后处理算法，也将发挥重要作用。这些现有技术加在一起，可以将剂量减少到原来的1/2到1/4。显示出在进一步减少剂量方面有相当大希望但距离商业应用还有几年或更长时间的技术进步包括压缩传感、感兴趣体积和内部断层扫描技术以及光子计数探测器。这份报告为CT用户以及研究和制造商社区提供了一份战略路线图，旨在实现常规有效剂量低于1mSv，这远远低于自然产生的放射源的年平均剂量。(C)RSNA，2012年
This Special Report presents the consensus of the Summit on Management of Radiation Dose in Computed Tomography (CT) (held in February 2011), which brought together participants from academia, clinical practice, industry, and regulatory and funding agencies to identify the steps required to reduce the effective dose from routine CT examinations to less than 1 mSv. The most promising technologies and methods discussed at the summit include innovations and developments in x-ray sources; detectors; and image reconstruction, noise reduction, and postprocessing algorithms. Access to raw projection data and standard data sets for algorithm validation and optimization is a clear need, as is the need for new, clinically relevant metrics of image quality and diagnostic performance. Current commercially available techniques such as automatic exposure control, optimization of tube potential, beam-shaping filters, and dynamic z-axis collimators are important, and education to successfully implement these methods routinely is critically needed. Other methods that are just becoming widely available, such as iterative reconstruction, noise reduction, and postprocessing algorithms, will also have an important role. Together, these existing techniques can reduce dose by a factor of two to four. Technical advances that show considerable promise for additional dose reduction but are several years or more from commercial availability include compressed sensing, volume of interest and interior tomography techniques, and photon-counting detectors. This report offers a strategic roadmap for the CT user and research and manufacturer communities toward routinely achieving effective doses of less than 1 mSv, which is well below the average annual dose from naturally occurring sources of radiation. (C) RSNA, 2012