Hi,
No, for SIENAX the data doesn't get resampled into standard space (so
you don't lose your resolution), it's just that a standard space mask
is transformed into native space, so it doesn't matter that the
standard space template being used is 2mm - you can use SIENAX in the
normal way.
Cheers.
On 25 Sep 2007, at 14:44, Antonios - Constantine Thanellas wrote:
>> The data should be as close as possible to the MNI152 standard image
>> resolution in both the in-slice resolution and slice thickness? In
>> FSL-FAQ
>> you mention that it's better to use in plane resolution of less
>> than 2mm and
>> slice thickness between 1 to 6 mm. So at least the slice thickness
>> in not an
>> important issue if it's between some limits (as it is also
>> mentioned in
>> Smith et. al 2002). Suppose that our data are of 1.7x1.7x1.7 mm. Is
>> it the
>> same to use the MNI152 of 1.5x1.5x1.5 or 2.0x2.0x2.0 or even the
>> 1x1x1 as
>> the standard image for our comparisons? Or we have to choose the
>> one that is
>> as close as possible to our data resolution (which is 1.5x1.5x1.5
>> in the
>> previous example)?
>
>>>>> Not sure what you're asking here...
>
> I mean that if my data are of 1x1x1 mm resulution then should i
> change the
> standard MNI image 2x2x2 mm which is used by sienax and randomise
> to 1x1x1
> mm MNI for more accurate results during the registration process?
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Stephen M. Smith, Professor of Biomedical Engineering
Associate Director, Oxford University FMRIB Centre
FMRIB, JR Hospital, Headington, Oxford OX3 9DU, UK
+44 (0) 1865 222726 (fax 222717)
[log in to unmask] http://www.fmrib.ox.ac.uk/~steve
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