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Matlab: inverse Radon transform

  1. Oct 19, 2006 #1
    Hopefully someone know image processing toolbox well enough to answer my question!

    I need to reconstruct an image from a sinogram, and I'm using the iradon(S,theta) function, where S is the sinogram image and theta is either a scalar or vector quantity of projection angles. However, we weren't given a set of projection angles to work with. Is there a way to look at the sinogram using image processing toolbox and extract the projection angle data?
  2. jcsd
  3. Oct 19, 2006 #2
    Nevermind, I got it.

    In case anyone is wondering,
    find the length of the matrix that defines the sinogram,
    then specify theta as going from 0:(length(S)-1), where S is your sinogram matrix.

    Apparently in the newest version of image processing toolbox you can define your own theta and simply use more or less projections than the image gives you.
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