[Mristudio-users] FA map problem

[Kotikalapudi Raviteja]

Dear Susumu,

I am a new student to the field of MR imaging. As of now, I am doing a
research where I have used SPM and DTI Studio to coregister and normalize
the images. I used the JHU parcellation in MRI Cro to extract the various
regions of interest. Now I have certain parameters such as ROI n, mean and
ROI SD. Could you please let me know a way to calculate FA, ADC values so
that I could draw various conclusions and comparisons.

Regards,
Ravi

On Fri, Jun 22, 2012 at 3:56 PM, susumu mori <susumu at mri.jhu.edu> wrote:

> well, you can always do image-domain interpolation. I'm not sure if it
> looks as pretty as the time-domain interpolation by scanners. Some people
> say that they are the same thing.
>
> One thing I can comment is, if you will use our atlas-based pipeline for
> image quantification, regardless of your image resolution, they are all
> resampled to 1x1x1 mm / 181x217x181, as defined by the MNI coordinates. So,
> you can just proceed to our MriStudio pipeline without any interpolation.
> You feed in your 2.5 mm resolution data and 1mm data will come out.
>
>
> On Fri, Jun 22, 2012 at 9:29 AM, Jiang, Jie <jie.jiang at emory.edu> wrote:
>
>>  Thanks for the response. So you mean I have to do this when I was doing
>> the scan and  there is no way to optimize the images during the
>> processing?Thanks
>>  ------------------------------
>> *From:* mristudio-users-bounces at mristudio.org [
>> mristudio-users-bounces at mristudio.org] on behalf of susumu mori [
>> susumu at mri.jhu.edu]
>> *Sent:* Thursday, June 21, 2012 6:17 PM
>> *To:* DTI Studio, ROI Editor, DiffeoMap Questions/Support
>> *Subject:* Re: [Mristudio-users] FA map problem
>>
>>  I recommend to do 2x interpolation (time-domain, not image-domain
>> interpolation, also called zerofilling or zeropadding) at the data
>> acquisition.  Unfortunately, you have to do this in the scanner.
>>
>> On Thu, Jun 21, 2012 at 5:55 PM, Jiang, Jie <jie.jiang at emory.edu> wrote:
>>
>>>  Dear all,
>>> I am using DTIStudio to get the FA image. The primary images are ok.
>>> However, after calculating, the FA maps are always much blur with pretty
>>> low resolution. Does anyone know how to improve the resolution or any
>>> suggestion? Thanks a lot.
>>> Best,
>>> Jie
>>>
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