How to add a noise in Shepp Logan Phantom?

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Desiree 2020 年 3 月 10 日

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https://jp.mathworks.com/matlabcentral/answers/510062-how-to-add-a-noise-in-shepp-logan-phantom

編集済み: Desiree 2020 年 3 月 11 日

Hello.

I wish to know how to add for example SNR=(-5)DB or SNR=(-3)DB to a Shepp Logan Phantom. I already know how to deploy the original image but I don’t know how to add these kind of noises. I be have the formula SNR=10*log_10(Var S/sigma^2) Var S is the array of noiseless projections. Sigma ^2 is the noise power fixed variance Help is appreciated!