<html><head><style type="text/css"><!-- DIV {margin:0px;} --></style></head><body><div style="font-family:times new roman, new york, times, serif;font-size:12pt"><DIV>Hi Santiago,</DIV>
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<DIV>We also have DTI images with 1x1x5 mm voxel size. We tried tractography using DTI Studio, but the fibers fell to propagate to next slices. I don't know whether reslicing to thinner slices will help or not. But even it works, the quality of the tractography will not be good.</DIV>
<DIV> </DIV>
<DIV>Jun Yi Wang</DIV>
<DIV>Predoc., University of Texas at Dallas</DIV>
<DIV>Research assistant, University of Texast Southwestern Medical Center<BR></DIV>
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<DIV style="FONT-SIZE: 13px; FONT-FAMILY: arial, helvetica, sans-serif">----- Original Message ----<BR>From: "mustela@mce.hggm.es" <mustela@mce.hggm.es><BR>To: mristudio-users@mristudio.org<BR>Sent: Monday, August 4, 2008 1:30:53 PM<BR>Subject: [Mristudio-users] non isometric voxels<BR><BR>Hi,<BR><BR>I wonder if someone has experience in DTI analysis using scans from a <BR>1.5 GE Signa. The problem is that images were acquired for 33 <BR>directions but with a pixel size of 1.1 x 1.1 x 5 mm (x,y,z) aquired <BR>in axial (x,y) plane. Far for being isometric, as recommended by the experts...<BR><BR>Before doing all the preprocessing, do you think that those images <BR>would be too noisy for tracktography or FA analysis??<BR>The data is intended to investigate group comparison patients <BR>/controls using ADC and RA values, and sample size is not very large.<BR><BR>Thanks in
advance,<BR><BR>Santiago<BR><BR>><((((º>`·.¸¸.·´¯`·.¸.·´¯`·...¸><((((º>`·.¸¸.·´¯`·.¸.·´¯`·...¸><((((º><BR> `·.¸¸.·´¯`·.¸.·´¯`·...¸><((((º>`·.¸¸.·´¯`·.¸.·´¯`·...¸><((((º>`·.¸¸.·´<BR>Santiago Reig<BR> Hospital General Universitario Gregorio Marañón<BR> Unidad de Medicina y Cirugía Experimental<BR> c/ Dr. Esquerdo 46, 28007 Madrid<BR> Tel: 34 91 426 5067 Fax: 34 91 426 5108<BR><A href="mailto:mustela@mce.hggm.es" ymailto="mailto:mustela@mce.hggm.es">mustela@mce.hggm.es</A> <A href="http://www.hggm.es/image" target=_blank>http://www.hggm.es/image</A> <BR><BR>_______________________________________________<BR>Mristudio-users mailing list<BR><A href="mailto:Mristudio-users@mristudio.org"
ymailto="mailto:Mristudio-users@mristudio.org">Mristudio-users@mristudio.org</A><BR><A href="http://lists.mristudio.org/mailman/listinfo/mristudio-users" target=_blank>http://lists.mristudio.org/mailman/listinfo/mristudio-users</A><BR></DIV></DIV></div><br>
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