Hi Michael,
answering to myself, I am afraid it may only be available starting
with VD11 as Monopolar or Bipolar (double refocusing) scheme or, as
Laura writes as WIP.
Cheers,
Martin
On Fri, Jun 17, 2011 at 3:04 PM, Michael Harms <[log in to unmask]> wrote:
> I've never seen such an option with the product DTI sequence.
>
> On Fri, 2011-06-17 at 06:17 +0200, Martin Kavec wrote:
>> Thanks a lot for the info, Michael and Andreas. Still a question on
>> DTI. I suppose that at VB17 software the DTI sequence uses the double
>> refocusing, since the TE is about 100 ms. Is there any option to turn
>> it off and thus shorten the TE? The only place where I would expect it
>> is would be possible to change is Diffusion Mode, but no option really
>> fit this idea.
>>
>> Thanks in advance for help,
>>
>> Martin
>>
>> On Fri, Jun 17, 2011 at 12:33 AM, Andreas Bartsch
>> <[log in to unmask]> wrote:
>> > hi,
>> >>Should it also be in A>>P?
>> > the phase encoding of the GE fieldmaps should not matter, i.e. it can be different from the EPI, even though i tend use the same settings for the two - except that i tend to acquire a few more slices on the fieldmap.
>> > hth,
>> > andreas
>> >
>> > ________________________________________
>> > Von: FSL - FMRIB's Software Library [[log in to unmask]] im Auftrag von Martin Kavec [[log in to unmask]]
>> > Gesendet: Donnerstag, 16. Juni 2011 23:20
>> > An: [log in to unmask]
>> > Betreff: [FSL] Field map for fMRI and DTI on Siemens
>> >
>> > Hi all,
>> >
>> > Before I start re-inventing a wheel: I see there is a field mapping
>> > sequence on Siemens Verio VB17. Anybody has experience in using it for
>> > unwarping fMRI and DTI (e.g. in the presurgical protocol)?
>> > Interestingly, the default fMRI sequences have A>>P phase encoding
>> > direction, but the field mapping sequence is encoded in R>>L
>> > direction. Should it also be in A>>P? How do I know the field map
>> > unwarp is being applied on the fMRI and DTI series?
>> >
>> > Thanks for sharing your experiences.
>> >
>> > Cheers,
>> >
>> > Martin
>
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