[Mristudio-users] A conceptual question on using B0 from different scans.

[Rosalia Dacosta Aguayo]

Of course, even more when evaluating changes. I know this can be
frustrating, but I do not what more can I do or say.
I am really sorry for you.
Best regards,
Rosalía.
El 24/01/2013 02:42, "Dorian P." <alb.net at gmail.com> escribió:

> Dear Dr. Mori,
>
> I appreciate your comment on this. Does it mean that anatomical
> differences out of the lesion area can be reflected on the B0? Shouldn't
> that baseline be mostly insensitive to white matter (or diffusion) changes?
>
> Thank you.
>
> Dorian
>
> 2013/1/23 susumu mori <susumu at mri.jhu.edu>
>
>> Because you expect anatomical change before and after surgery, I think
>> it's difficult to share a b0 image for both scans.
>>
>> On Wed, Jan 23, 2013 at 11:13 AM, Dorian P. <alb.net at gmail.com> wrote:
>>
>>> Dear all,
>>>
>>> I have a particular situation and would like your help. The DWI
>>> acquisitions from a very important subject have been recorded with errors
>>> from the scanner. I have most of the gradient directions, but not the B0.
>>> This would prevent me from calculating DTI, of course.
>>>
>>> But I have a later DWI acquisition from the same subject, post surgery.
>>> So I was wondering if I can recover the pre-surgical DTI by using the B0
>>> from the post-surgery scan.
>>>
>>> So, do you think I can play around the problem and use the B0 from the
>>> second acquisition to calculate DTI on the first? Or, to put the question
>>> differently, are the changes in white matter reflected both on DWI and on
>>> the non-DWI images, or does the B0 stay the same insensitive measure to
>>> white matter changes, which are captured with DWI images.
>>>
>>> Finally, would it make sense to make this swap and calculate FA with the
>>> same B0 both pre and post or this is simply a delirious solution?
>>>
>>>
>>> Thank you.
>>>
>>> Dorian
>>>
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>>
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