Performance of Digital Radiographic Detectors : Quantification and Assessment Methods 1
Performance of Digital Radiographic Detectors : Quantification and Assessment Methods 1
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数字放射线探测器的性能：量化和评估方法 1
DOI：
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发表时间：
2001
期刊：
影响因子：
--
通讯作者：
E. Samei
中科院分区：
文献类型：
--
作者：
E. Samei
数字射线照相系统在许多临床应用中得到广泛使用。数字射线照相检测器在其使用的技术和特定实施方式方面变化很大。因此，它们的性能因系统而异。为了优化、设计、比较或质量保证目的，通常需要表征数字射线照相或乳腺摄影探测器的性能。要做到这一点，最有用的方法是根据常用的性能指标来衡量检测器的性能，这样就可以进行有意义的比较。数字射线照相检测器的性能可以根据多个性能因素来描述。其中，清晰度和噪声是描述数字射线照相系统的内在图像质量性能的两个关键特性（1，2）。这两者一起，沿着相关联的特性，即信噪比（SNR），定义了成像系统忠实地表示被成像的身体部分的解剖特征的固有能力。本章首先着重于在射线照相系统中的锐度，噪声和SNR的量化的调制传递函数（MTF），噪声功率谱（SNR）和检测量子效率（DQE）的常见性能指标。然后描述用于测量MTF、反射率和DQE的方法。本章最后概述了在全面评估探测器性能时可能考虑的探测器性能因素。教学大纲中的下一章将重点讨论影响数字射线检测器的清晰度和噪声性能的因素。
Digital radiographic systems are gaining widespread use in many clinical applications. Digital radiographic detectors vary dramatically with respect to the technologies that they use and the particular implementation. Their performance thus varies from system to system. It is often necessary to characterize the performance of a digital radiographic or mammographic detector for optimization, design, comparison, or quality assurance purposes. To do so, it is most useful to measure the performance of the detector in terms of common performance metrics, so that meaningful comparisons can be made. The performance of a digital radiographic detector can be described in terms of a number of performance factors. Among them, sharpness and noise are two key characteristics that describe the intrinsic image quality performance of digital radiographic systems (1,2). Together, these two, along with an associated characteristic, the signal-to-noise ratio (SNR), define the intrinsic ability of an imaging system to faithfully represent the anatomic features of the body part being imaged. This chapter first focuses on the quantification of sharpness, noise, and SNR in radiographic systems in terms of common performance metrics of the modulation transfer function (MTF), the noise power spectrum (NPS), and the detective quantum efficiency (DQE). Methods for measuring the MTF, the NPS, and the DQE are then described. The chapter ends with an outline of detector performance factors that may be considered in a comprehensive evaluation of the performance of a detector. The next chapter in the syllabus focuses on the factors that influence the sharpness and noise performance of a digital radiographic detector.
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3.8
作者：
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影响因子：
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作者：
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