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信噪比（signal to noise ratio,SNR）是MRI最基本的质量参数，其正确的概念表述应为（）
- A、图像的亮度与暗度之比
- B、两个像素的信号强度之比
- C、两个体素的信号强度之比
- D、图像的信号强度与背景强度之比
- E、图像的信号与噪声之比
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更多 “信噪比（signal to noise ratio,SNR）是MRI最基本的质量参数，其正确的概念表述应为（）A、图像的亮度与暗度之比B、两个像素的信号强度之比C、两个体素的信号强度之比D、图像的信号强度与背景强度之比E、图像的信号与噪声之比” 相关考题
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单选题What is an advantage of an externally modulated laser over a directly modulated laser?（）A
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单选题In the OSNR model for EDFA amplifiers， SNR OUT = 1/（1/SNR IN + FhvB/P IN ）， what does SNR IN represent？（）A
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单选题In the OSNR model for EDFA amplifiers, SNR OUT = 1/(1/SNR IN + FhvB/P IN ), what does SNR IN represent?（）A
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单选题信噪比（signal to noise ratio,SNR）是MRI最基本的质量参数，其正确的概念表述应为（）A
图像的亮度与暗度之比B
两个像素的信号强度之比C
两个体素的信号强度之比D
图像的信号强度与背景强度之比E
图像的信号与噪声之比
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单选题What is an advantage of an externally modulated laser over a directly modulated laser？ （）A
lower costB
higher chirpC
easier to manufactureD
higher dispersion toleranceE
higher optical signal-to-noise ratio
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