Hi Steve,
So does it mean that inconsistent voxel sizes (and SNR) across
subjects is something more deleterious than manipulating temporal
resolution for analysing functional connectivity?
Thanks,
Sourena
On 8/3/13, Stephen Smith <[log in to unmask]> wrote:
> Hi - one good option is to adjust the slice angle to optimise the coverage
> in the first place, and then add more slices (increasing the TR). You may
> then need to acquire for longer to make up for the lost number of timepoints
> (due to increased TR).
>
> Steve.
>
>
> On 3 Aug 2013, at 00:50, Sourena Soheili <[log in to unmask]> wrote:
>
>> Hi FSL community,
>> If brain stem is of particular interest for resting state functional
>> connectivity analysis using MELODIC, what is the best strategy for
>> assuring a whole brain coverage in subjects with larger brains? Is it
>> either increasing the slice thickness, adding to the interslice gap,
>> or increasing the slice count across the z direction (with a possible
>> subjectwise discrepancy in TR)?
>>
>> Thanks in advance,
>> Sourena Soheili-Nezhad, MD
>>
>
>
> ---------------------------------------------------------------------------
> 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
> ---------------------------------------------------------------------------
>
> Stop the cultural destruction of Tibet
>
>
>
>
>
|