[Mristudio-users] define ROI in DTI Studio and ROI Editor

[Xin Li]

Hello Minjie,

It is because that the voxel boundary follows the pixel definition. Therefore, even if you draw a round shape, it will still follow the square pixel shape.


Regards,


Xin







----- Original Message -----
From: Minjie Wu <minjiewu at gmail.com>
Date: Monday, June 28, 2010 3:45 pm
Subject: Re: [Mristudio-users] define ROI in DTI Studio and ROI Editor
To: "DTI Studio, ROI Editor, DiffeoMap Questions/Support" <mristudio-users at mristudio.org>


> Hello Xin,
>  
>  I have created two ellipsis ROIs of the same size (4x4). The one on 
> the left
>  is added to an object, and the one on the right is not added to an object.
>  The object looks like an arrow instead of an ellipsis. Please see the
>  screenshot through the link.
>  
>  
>  
>  Thanks,
>  Minjie
>  
>  On Mon, Jun 28, 2010 at 1:47 PM, Xin Li <xli16 at jhmi.edu> wrote:
>  
>  > Hello Minjie,
>  >
>  > May I ask what you mean about "ellipsis no longer looks like ellipsis"?
>  >
>  >
>  > Xin
>  >
>  >
>  > ----- Original Message -----
>  > From: Minjie Wu <minjiewu at gmail.com>
>  > Date: Monday, June 28, 2010 1:45 pm
>  > Subject: [Mristudio-users] define ROI in DTI Studio and ROI Editor
>  > To: mristudio-users at mristudio.org
>  >
>  >
>  > > Hello All,
>  > >
>  > >  We need to measure FA in the substantia nigra (SN) in our 
> project. Small
>  > >  ellipse ROIs (4x4) are placed in these area using DTI Studio and 
> ROI
>  > > Editor
>  > >  respectively.
>  > >
>  > >  1. For DTI Studio, the ROI is not placed at the center of the
>  > crosshairs,
>  > >  but instead there is an offset. Is there any way to fix or 
> adjust this?
>  > >
>  > >  2. For ROI Editor, the ellipsis ROI (4x4) is placed in SN, and the
>  > location
>  > >  of the ROI can be adjusted, then added to an object. However 
> once the
>  > >  ellipsis ROI is combined to an object, ellipsis no longer looks 
> like
>  > >  ellipsis. Is there any way to avoid this?
>  > >
>  > >  Thank you very much.
>  > >
>  > >  Sincerely,
>  > >
>  > >  --
>  > >  Minjie Wu, PhD
>  > >  Department of Neurology
>  > >  Northwestern University
>  > >  710 N Lake Shore Dr
>  > >  Abbott Hall, 11th floor, Suite 1107
>  > >  Chicago IL 60611
>  > >  Phone: 312-503-1522
>  > > _______________________________________________
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>  > >  Mristudio-users at mristudio.org
>  > >
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>  
>  
>  
>  -- 
>  Minjie Wu, PhD
>  Department of Neurology
>  Northwestern University
>  710 N Lake Shore Dr
>  Abbott Hall, 11th floor, Suite 1107
>  Chicago IL 60611
>  Phone: 312-503-1522 
> _______________________________________________
>  Mristudio-users mailing list
>  Mristudio-users at mristudio.org
>  
>  Unsubscribe, send a blank email to: Mristudio-users-unsubscribe at mristudio.org