Measuring the signal-to-noise ratio in magnetic resonance imaging: a caveat
Measuring the signal-to-noise ratio in magnetic resonance imaging: a caveat
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DOI：
10.1016/j.sigpro.2004.03.006
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发表时间：
2004-06-01
影响因子：
4.4
通讯作者：
Fitzsimmons, JR
中科院分区：
文献类型：
--
作者：
Erdogmus, D;Larsson, EG;Fitzsimmons, JR
信噪比(SNR)作为生物医学图像的客观质量指标的有效性一直是争论的主题。然而，信噪比是用于评估图像质量和评估图像增强和信号处理技术的有效性的最常用的指标。在这一通信中，我们说明了在一定条件下，信噪比可以通过非线性变换来改变，并且通常很难客观地测量。因此，问题不仅是人类观察者所感知的SNR与图像质量的相关性有多好(这一直是早期辩论的主要主题)，而且从定量测量的角度来看，SNR是值得怀疑的。(C)2004爱思唯尔B.V.保留所有权利。
The validity of the signal-to-noise ratio (SNR) as an objective quality measure for biomedical images has been the subject of a long-standing debate. Nevertheless, the SNR is the Most Popularly used measure both for assessing the quality of images and for evaluating the effectiveness of image enhancement and signal processing techniques. In this correspondence, we illustrate that under certain conditions the SNR can be changed by a nonlinear transformation, and also that it is often hard to measure objectively. Therefore, the issue is not only how well the SNR correlates with image quality as perceived by a human observer (which has been the primary subject of earlier debate), but also that SNR is questionable from a quantitative measurement point of view. (C) 2004 Elsevier B.V. All rights reserved.