Dear Carles,
given your sufficiently large number of subjects, you could create your own
template from the healthy controls. I would smooth the partitions by about
8mm FWHM for the template creation.
Regards-
Andreas
----- Original Message -----
From: "Carles Soriano-Mas" <[log in to unmask]>
To: <[log in to unmask]>
Sent: Friday, August 02, 2002 7:33 PM
Subject: Template creation vs. a priori images
> Hello SPMers,
>
> I'm conducting a VBM analysis following Good et al. optimized protocol. I
> have a sample of 72 patients and 72 controls matched by age and sex. Which
> do you think is the best option: to create grey and white matter templates
> by averaging the 72 normalized, segmented and smoothed images from my
> controls or to use the grey and white matter templates from the apriori
> directory?
>
> If I should create my own template, how much smoothing do I have to apply
> to the segmented images, 12mm, 8mm?
>
> Thanks so much,
>
> Carles Soriano-Mas, Ph.D.
> Magnetic Resonance Center of Pedralbes
> Barcelona, Spain
>
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