Dear Michel,
Creating a halfway transformation for fnirt is a *lot* harder and we have not implemented this.
So I'm afraid the answer at the moment is no.
All the best,
Mark
On 25 Jul 2012, at 12:21, Michel Thiebaut de Schotten wrote:
> Dear all,
>
> Would it be possible to carry on the same analysis with fnirt?
> Thanks for your response,
>
> Michel
>
> Sent from my iPad
>
> On Jul 25, 2012, at 10:42 AM, Mark Jenkinson <[log in to unmask]> wrote:
>
>> Hi,
>>
>> Yes, in SIENA we just use the one transformation.
>> Essentially we do the same thing as in the script - use avscale to get the halfway transforms.
>> It outputs both a forward halfway and a backward halfway transform, so you can get all you need from one call of avscale on a single transformation matrix.
>>
>> All the best,
>> Mark
>>
>>
>> On 25 Jul 2012, at 10:37, Andreas Bartsch wrote:
>>
>>> Hi,
>>>
>>> that would assume that the registration is inversely consistent between
>>> the two images which is not necessarily the case.
>>> Cheers,
>>> Andreas
>>>
>>> Am 25.07.12 11:20 schrieb "Gabor Perlaki" unter
>>> <[log in to unmask]>:
>>>
>>>> Dear Saad,
>>>>
>>>> Thank you for your answer. I don't understand something in the script
>>>> you sent.
>>>>
>>>> There is two registration in the script:
>>>>
>>>> 1, A image to the B
>>>> 2, B image to the A
>>>>
>>>> and after that the Forward half transform from the first registration is
>>>> applied for A image and the Forward half transform from the second
>>>> registration is applied for B image.
>>>>
>>>> Why do we need 2 registrations? Wouldn't it better to do only the first
>>>> registration and after that applying the Forward half transform to the A
>>>> image and the Backward half transform to the B image?
>>>>
>>>> Thanks,
>>>> Gabor
>>>
>
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