In the research of the computed tomography (CT) reconstruction, one needs to simulate the noise during CT projection and capturing. Then, my questions are:

  1. How about the proper noise type?
  2. How to add the noise, in the sinogram domain or the frequency domain?

Any reference materials are also preferred.


1 Answer 1


The easiest, and probably most straight forward way, seems to add the noise in the measurement domain, hence the sinogram.

  • $\begingroup$ Thank you. how about the noise type? Gaussian? $\endgroup$
    – lxg
    Sep 27, 2016 at 16:47
  • 1
    $\begingroup$ I don't know. I wouldn't expect Gaussian noise, since your detector cannot measure negative signals. I would expect it to be a Poisson-distribution. $\endgroup$
    – M529
    Sep 27, 2016 at 18:25
  • $\begingroup$ thank you, can you recommend any references? $\endgroup$
    – lxg
    Sep 27, 2016 at 23:14
  • $\begingroup$ No, I can't. I would take a first step by googling noise computer tomography ;) $\endgroup$
    – M529
    Sep 28, 2016 at 17:08
  • $\begingroup$ Thanks. I found a similar question: cn.mathworks.com/matlabcentral/newsreader/view_thread/315689 $\endgroup$
    – lxg
    Sep 29, 2016 at 23:09

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