Hi Wenshu,<div><br></div><div>In old days, Philips scanners were saving DTI data in slice-by-slice but I thought the current REC files are gradient-by-gradient order. Anyway, it seems that you can control the way images are saved in a REC file. Please make sure that the locations of the b0 image (either the first or the second from the last) is also correct.</div>
<div><br></div><div>Please read the images by Mri3DView first and make sure that the order of the images is the same of your gradient table. If the images are read correctly and the order matches to the gradient table, there is no reason that you can't get the same quality of images.</div>
<div><br></div><div>Another possibility is the quality of your data. Please make sure that your subject didn't move. If you acquired multiple REC files, you can create subtracted images to quickly check the subject motion.</div>
<div><br></div><div>Susumu<br><br><div class="gmail_quote">On Mon, Feb 8, 2010 at 3:25 AM, 钱文枢 <span dir="ltr"><<a href="mailto:qianwenshu@gmail.com">qianwenshu@gmail.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex;">
<div>Hi, all</div>
<div> </div>
<div>I have used DTIStudio to calculate tensor index. The former order of stored images in .REC file is "gradient by gradient", every result is OK. The latest two patients' data has been saved as "slice by slice". Though I chose "slice by slice" when input data, the calculated tensor index were all blurry. I wanna know if the resluts will be influenced by the order of stored images in .REC or the blur is just caused by other effects such as movements.</div>
<div>Did anyone have the same problem?</div>
<div> </div>
<div>Thank you!</div>
<div> </div>
<div> </div>
<div>Regards,</div>
<div>Wenshu Qian</div>
<div> </div>
<div>Department of Diagnostic Radiology</div>
<div>The University of Hong Kong</div>
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