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Hi Hangyi, <BR>
<BR>
Thank you for your timely reply. It is clear now. <BR>
<BR>
So, I need to transform patient-coordinate based gradient vector to image coordinate space, then input them to the DTI Studio. <BR>
<BR>
Qiqi<BR>
<BR> <BR>> Date: Mon, 25 Oct 2010 11:02:42 -0400<BR>> From: hjiang@jhmi.edu<BR>> To: mristudio-users@mristudio.org<BR>> Subject: Re: [Mristudio-users] Is DTIStudio based on DICOM patient coordinate system or image coordinate system?<BR>> <BR>> hi,<BR>> <BR>> the gradients are defined on image coordinate system. (x,y,z) is corresponding to (column, row, slice) of the image volume. if the (x,y,z) system is consistent with the patient-coordinate (e.g. LPS, axial slicing), you may direcly apply the gradient vectors into the program. otherwise, you may need to adjust the given-vectors before the tensor calculation.<BR>> <BR>> regards,<BR>> <BR>> hangyi<BR>> <BR>> <BR>> <BR>> <BR>> <BR>> ________________________________<BR>> From: mristudio-users-bounces@mristudio.org [mristudio-users-bounces@mristudio.org] On Behalf Of chichesterchiche [seigeweb@hotmail.com]<BR>> Sent: Sunday, October 24, 2010 11:26 PM<BR>> To:
mristudio-users@mristudio.org<BR>> Subject: [Mristudio-users] Is DTIStudio based on DICOM patient coordinate system or image coordinate system?<BR>> <BR>> Dear DTIStudio Experts,<BR>> <BR>> We know we need to input the gradient table in DTIStudio. However, when doing tensor map calculation, which coordinate system is DTIStudio based on? Is DTIStudio based on DICOM patient coordinate system or image coordinate system? I acquired the DWI images by TOSHIBA MRI and the gradient vectors are based on patient coordiante. Can I input the patient-coordinate-based gradient vector to DTI Studio directly, or do I need to transform the patient-coordinate-based gradient vector to image coordinate system at first?<BR>> <BR>> Thank you.<BR>> <BR>> Qiqi<BR>> <BR>> _______________________________________________<BR>> mristudio-users mailing list<BR>> mristudio-users@mristudio.org<BR>> http://lists.mristudio.org/mailman/listinfo/<BR>> Unsubscribe, send a
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