The signal to noise ratio (SNR) of tumors, contrast to noise ratio (CNR) and signal intensity ratio (SIR) of tumors and normal liver were calculated and analyzed.
计算不同图像中肿瘤信噪比（SNR）、肿瘤与肝脏对比噪声比（CNR）及信号强度比（SIR）等数据，并进行统计学分析。
Signal to Noise Ratio( SNR): The ratio of the signal to the random noise in a set of data.
信噪比：平均到一个数据单元的信号与随机噪声的比值。
Signal to Noise Ratio( SNR): The ratio of the signal to the random noise in a set of data.
信噪比：平均到一个数据单元的信号与随机噪声的比值。
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