Dear Jesper,
Thank you so much for your clarification!
To be honest, I'm confused about this.
Thanks,
Ikko
2015-03-18 0:50 GMT+09:00 Jesper Andersson <[log in to unmask]>:
> Dear Ikko,
>
> the HCP data is “multi-shell” and eddy is fine with that. I.e. with data
> that fall on a small(ish) number of shells/b-values.
>
> What it can NOT deal with yet is when data has been sampled on a regular
> grid in Q-space.
>
> Jesper
>
> On 17 Mar 2015, at 13:30, 木村一皓 <[log in to unmask]> wrote:
>
> Sorry, I forgot to add something.
> In fact, I've used preprocessed-data of HCP (b-value=1000, 2000,
> 3000) to do QSDR in DSI-STUDIO.
> In this case, nothing was wrong, as far as I see...
>
> Best,
> Ikko
>
> 2015-03-17 22:03 GMT+09:00 Matt Glasser <[log in to unmask]>:
>
>> Well the eddy current distortions will be there regardless of if the
>> SNR is too poor to see them. We generally prefer analyzing data that gives
>> viewable and artifact correctable results.
>>
>> Peace,
>>
>> Matt.
>>
>> From: 木村一皓 <[log in to unmask]>
>> Reply-To: FSL - FMRIB's Software Library <[log in to unmask]>
>> Date: Tuesday, March 17, 2015 at 7:06 AM
>> To: <[log in to unmask]>
>> Subject: Re: [FSL] EDDY tool for DSI dataset
>>
>> Dear Jess,
>> (Sorry I'm not expert, just your colleague)
>>
>> According to "DSI-STUDIO," doing eddy current correction is
>> not recommended for the DSI data for its high b-value.
>> You might want to see here.
>> http://dsi-studio.labsolver.org/discussion-group ("DSI-Preprocessing")
>> And the thesis I've read dealing with DSI-data also didn't do
>> motion-correct, nor eddy-current correction steps.
>> http://www.sciencedirect.com/science/article/pii/S105381191101130X
>>
>> So I think, for DSI-data, skipping these steps would be correct...
>>
>> Best,
>> Ikko
>>
>> Medicine / Medicine
>> Osaka University / Japan
>>
>> 2015-03-17 20:26 GMT+09:00 Jesper Andersson <
>> [log in to unmask]>:
>>
>>> Dear Jess,
>>>
>>> you are right that the current release doesn’t support DSI data. You
>>> could try eddy_correct which is also part of the FSL distribution.
>>>
>>> I am afraid that I know too little about non-FSL software for eddy
>>> current-correction, but maybe someone else has suggestions for something
>>> the works with DSI data?
>>>
>>> Jesper
>>>
>>> On 13 Mar 2015, at 18:18, Jiaqi Sun <[log in to unmask]> wrote:
>>>
>>> Hi all,
>>>
>>> As far as I know the current release of eddy doesn't work for DSI
>>> data. Please correct me if I am wrong. Does anyone happen to know about any
>>> alternative method I could use to perform eddy current correction on
>>> DSI data?
>>>
>>> Any help is highly appreciated!!!
>>> Thanks!
>>> Jess
>>>
>>>
>>>
>>
>
>
