核磁共振相控阵幅度图像中的信噪比测量。
Signal-to-noise measurements in magnitude images from NMR phased arrays.
作者信息
Constantinides C D, Atalar E, McVeigh E R
机构信息
Department of Biomedical Engineering, Johns-Hopkins University School of Medicine, Baltimore, Maryland, USA.
出版信息
Magn Reson Med. 1997 Nov;38(5):852-7. doi: 10.1002/mrm.1910380524.
Abstract
A method is proposed to estimate signal-to-noise ratio (SNR) values in phased array magnitude images, based on a region-of-interest (ROI) analysis. It is shown that the SNR can be found by correcting the measured signal intensity for the noise bias effects and by evaluating the noise variance as the mean square value of all the pixel intensities in a chosen background ROI, divided by twice the number of receivers used. Estimated SNR values are shown to vary spatially within a bound of 20% with respect to the true SNR values as a result of noise correlations between receivers.
摘要
提出了一种基于感兴趣区域（ROI）分析来估计相控阵幅度图像中信噪比（SNR）值的方法。结果表明，可以通过校正测量信号强度的噪声偏差效应，并将噪声方差评估为所选背景ROI中所有像素强度的均方值，再除以所用接收器数量的两倍来找到SNR。由于接收器之间的噪声相关性，估计的SNR值在空间上相对于真实SNR值在20%的范围内变化。
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本文引用的文献
1
The Rician distribution of noisy MRI data.噪声MRI数据的莱斯分布。
Magn Reson Med. 1995 Dec;34(6):910-4. doi: 10.1002/mrm.1910340618.
2
An unbiased signal-to-noise ratio measure for magnetic resonance images.一种用于磁共振图像的无偏信噪比测量方法。
Med Phys. 1993 Jul-Aug;20(4):1077-8. doi: 10.1118/1.597004.
3
The use of power images to perform quantitative analysis on low SNR MR images.使用功率图像对低信噪比磁共振图像进行定量分析。
Magn Reson Imaging. 1993;11(7):1051-6. doi: 10.1016/0730-725x(93)90225-3.
4
A phased array coil for human cardiac imaging.一种用于人体心脏成像的相控阵线圈。
Magn Reson Med. 1995 Jul;34(1):92-8. doi: 10.1002/mrm.1910340114.
5
Calculation of the signal-to-noise ratio for simple surface coils and arrays of coils.简单表面线圈及线圈阵列的信噪比计算。
IEEE Trans Biomed Eng. 1995 Sep;42(9):908-17. doi: 10.1109/10.412657.
6
A signal-to-noise calibration procedure for NMR imaging systems.一种用于核磁共振成像系统的信噪比校准程序。
Med Phys. 1984 Mar-Apr;11(2):180-5. doi: 10.1118/1.595484.
7
Noise and filtration in magnetic resonance imaging.磁共振成像中的噪声与滤波
Med Phys. 1985 Sep-Oct;12(5):586-91. doi: 10.1118/1.595679.
8
Measurement of signal intensities in the presence of noise in MR images.在磁共振成像中存在噪声的情况下测量信号强度。
Med Phys. 1985 Mar-Apr;12(2):232-3. doi: 10.1118/1.595711.
9
Improved detectability in low signal-to-noise ratio magnetic resonance images by means of a phase-corrected real reconstruction.通过相位校正的实部重建提高低信噪比磁共振图像中的可检测性。
Med Phys. 1989 Sep-Oct;16(5):813-7. doi: 10.1118/1.596304.
10
The NMR phased array.核磁共振相控阵
Magn Reson Med. 1990 Nov;16(2):192-225. doi: 10.1002/mrm.1910160203.
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