Thank you very much John
Could you provide me with some links regarding how this new method should work with PET? Does it still attempt a segmentation even in PET? Should I be using the same tissue probability maps used for MRI? Did anybody try this method and compared it with the old normalization? I haven't found it cited yet. By the way, what should be my bias field correction regularization setting, to have it not running?
Thank you again
Luca
Da: John Ashburner <[log in to unmask]>
Inviato: mercoledì 27 aprile 2016 17.25.53
A: PRESOTTO LUCA
Cc: [log in to unmask]
Oggetto: Re: [SPM] Normalizing PET in SPM12-JohnYou are right. The settings for the default SPM12 spatial normalisation are not ideal for PET because of the intrinsic smoothness of PET images. One of the model assumptions is that noise is independent from voxel to voxel, which generally is not the case for PET. You can use the default normalisation for PET though, but it involves changing one of the settings on the user interface. This is the "smoothness", which you could try changing to (eg) 8 mm.Best regards,
On 27 April 2016 at 15:12, PRESOTTO LUCA <[log in to unmask]> wrote:
Hi there!
I'm starting to use SPM12, and I'm working on PET images. However, if after opening SPM in the PET modality, I selected "normalise (estimate & write)". However, in SPM12, if I'm not mistaken, this module is not meant for PET and I have to use "old normalise". Did I get this right?
Or can PET benefit also from the new normalise? (Unless I'm not mistake I'd say that the parameters are absolutely not meant for PET images)
Thank you,
Luca
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