[Accuracy of contrast-to-noise ratio measurement for magnetic resonance clinical images].
[Accuracy of contrast-to-noise ratio measurement for magnetic resonance clinical images].
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[磁共振临床图像对比噪声比测量的准确性]。
DOI：
10.6009/jjrt.kj00003326578
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发表时间：
2004
期刊：
影响因子：
--
通讯作者：
T. Hongoh
中科院分区：
文献类型：
--
作者：
Akio Ogura;Fumie Maeda;Akira Miyai;T. Hongoh
对比度噪声比(CNR)通常被用来评价磁共振图像，因为它包括对比度和信噪比两个部分，它反映了临床病变的可检测性。采用两种方法(使用体模和临床影像)测量CNR。此外，还有一些使用临床图像的测量方法。在这份报告中，使用临床图像对四种测量CNR的方法的测量准确性和信号可检测性的相关性进行了评估。结果表明，使用空气信号的组织间方法提供了良好的准确度，并且与使用观测器性能的信号可检测性一致。此外，较小的感兴趣区(ROI)更适合作为使用临床图像进行CNR测量的目标。
The contrast-to-noise ratio (CNR) is often used to evaluate magnetic resonance images, because it has two components, contrast and SNR, and indicates the detectability of clinical lesions. Two methods (using a phantom and using clinical images) are employed to measure CNR. In addition, there are some methods of measurement that use clinical images. In this report, the accuracy of measurement and correlation for signal detectability were evaluated in four methods of measuring CNR using clinical images. The results indicated that the inter-tissue method using an air signal provided good accuracy and was consistent with signal detectability using observer performance. In addition, a small region of interest (ROI) was better suited as the target for CNR measurement using clinical images.