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> I'd like to realize the following sentence in a paper: > "Segmented images were convoluted with the point spread function of the PET > device". > This procedure is a step of PVE-correction of (in my case) FDG PET images. > How and with what sofware should/can the convolution be peformed? What > PSF-values should be applied in the case of the Siemens ECAT EXACT scanner > (CTI, Knoxville, Tennessee; 3D mode)? This will depend on what filter settings were used for the filtered back-projection reconstruction (or other things for EM reconstructed images), as well as how the acquisition was done (septa in, with 2D reconstruction or septa out and 3D reconstruction). I would suggest speaking with your local PET physicists, who may have measured (and maybe modelled) the PSF(s). If the PSF is stationary and can be well approximated by a Gaussian of known FWHM, then you could use the Smooth button of SPM to do the convolution. Best regards, -John