[Castor-users] Construction of Castor histogram data file

[Schagt, I.H. van der]

Hi Castor developers and users,

A few moths ago I got the code for saving the forward projections (castor-proj) and I have used this a lot to generate PET-data so far.
I try to manually put Gaussian blur over the sinogram data to simulate the poorer resolution of PET data by PSF. I want to do this by putting a Gaussian blur on every single 2D-sinogram. In order to do this, I need to understand how the sinogram datafile is constructed and this has not become very clear to me yet. I know that every 16 bytes (for my data) describe one bin in the sinogram, but I don't know in what order this dat is stored and whether I can properly separate the sinograms here to apply Gaussian blur.
Is it possible to provide more clarity on how the sinogram datafiles are constructed when formed with castor-proj?

Many thanks in advance,
Inge

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