Hi Michael,
ah - thanks, I should have mentioned that: It was WITHOUT.
Cheers,
Andreas
Am 04.11.2015 20:28 schrieb "Harms, Michael" <[log in to unmask]>:
>
>
> Hi Andreas,
> Was that with or without a phase-encoding reversed pair for each diffusion
> direction?
>
> --
> Michael Harms, Ph.D.
>
> -----------------------------------------------------------
> Conte Center for the Neuroscience of Mental Disorders
> Washington University School of Medicine
> Department of Psychiatry, Box 8134
> 660 South Euclid Ave.Tel: 314-747-6173
> St. Louis, MO 63110Email: [log in to unmask]
>
>
>
>
> On 11/4/15 12:44 PM, "Andreas Bartsch" <[log in to unmask]> wrote:
>
> Hi there,
>
> I have gotten good results from eddy with 12 diffusion dirs and even with
> just 3.
> It may be worth to try. Just check the outputs.
> Cheers,
> Andreas
>
> Am 02.11.15 13:59 schrieb "FSL - FMRIB's Software Library on behalf of
> Jesper Andersson" unter <[log in to unmask] on behalf of
> [log in to unmask]>:
>
> >Dear Marek,
> >
> >> I would like to ask a general question about FSL, one specific about
> >>eddy_correction and the one about new eddy script.
> >> The general question:
> >> I have a data set of 1 b0 volume and 15 diffusion weighted volumes
> >>(DWI) of human spinal cord. Which scripts are suitable to use on this
> >>data set (I mean which are applicable to general data and which are
> >>applicable specifically only to brain? E.g. BET works obviously on brain
> >>only...)?
> >
> >most of the diffusion tools can be used also outside the brain.
> >eddy_correct, eddy, dtifit, bedpost etc should all work fine. Many of
> >them take masks that you will have to make manually (because bet won¹t
> >work).
> >
> >> Eddy_correct:
> >> I used eddy_correct on my data set and generally it works right but
> >>after application on same data random DWI volumes are all-zero (without
> >>any error massage) which produce wrong FA image. I use same magnet, same
> >>protocol, same everything, but sometimes eddy_correct works wrong and I
> >>do not know why. Can you help me?
> >> Eddy:
> >> You gave an example on FSL web site on data set with 5 b0 and 59 DWI
> >>images but it is possible to use eddy to my data set (1 b0 and 15 DWI
> >>images)? Could eddy gives better results than eddy_correct script? I
> >>mean if eddy can fix the problem with zero volumes which eddy_correct
> >>makes.
> >
> >I suspect that 15 dwi might be pushing it a bit for eddy, but there is no
> >harm in trying.
> >
> >The problem with all zero sounds strange though. Have you looked at the
> >resulting .mat files to see if you have some very large translations that
> >have translated the object outside the FOV?
> >
> >Jesper
> >
> >
> >> Thanks
> >> Marek
>
>
> ________________________________
> The materials in this message are private and may contain Protected Healthcare Information or other information of a sensitive nature. If you are not the intended recipient, be advised that any unauthorized use, disclosure, copying or the taking of any action in reliance on the contents of this information is strictly prohibited. If you have received this email in error, please immediately notify the sender via telephone or return mail.
|