<table cellspacing="0" cellpadding="0" border="0" ><tr><td valign="top" style="font: inherit;"><DIV>Thanks susumu! Thanks Hangyi!</DIV>
<DIV>Best regards.</DIV>
<DIV> </DIV>
<DIV>Weina</DIV>
<DIV>2012-4-25<BR><BR>--- <B>12年4月25日，周三, susumu mori <I><susumu@mri.jhu.edu></I></B> 写道：<BR></DIV>
<BLOCKQUOTE style="BORDER-LEFT: rgb(16,16,255) 2px solid; PADDING-LEFT: 5px; MARGIN-LEFT: 5px"><BR>发件人: susumu mori <susumu@mri.jhu.edu><BR>主题: Re: [Mristudio-users] Question about fiber coordinate<BR>收件人: "DTI Studio, ROI Editor, DiffeoMap Questions/Support" <mristudio-users@mristudio.org>, "Hangyi Jiang" <hjiang@jhmi.edu><BR>日期: 2012年4月25日,周三,上午6:59<BR><BR>
<DIV id=yiv1538504903>
<DIV class=yiv1538504903gmail_extra>Hi Weina,</DIV>
<DIV class=yiv1538504903gmail_extra><BR></DIV>
<DIV class=yiv1538504903gmail_extra>There are two types of data formats for fiber tracking. The "raw" format of the fiber tracking is streamline information. For example, if you get 10 lines, you have 10 streamline information. Each streamline contains information of sequential coordinates. These coordinates use floating point coordinates as you saw. This is why streamline looks much more high resolution than raw images. We artificially increase the resolution to draw the streamlines. FAQ#1 describes how the streamline information is stored. If you store your results as this streamline information, you can later edit the results like removing some lines by the "NOT" operation.</DIV>
<DIV class=yiv1538504903gmail_extra><BR></DIV>
<DIV class=yiv1538504903gmail_extra>The second format is the "image" format. In this format, the streamline information is converted to a binary (1/0) masking image. If your image is 256x256x50, then this binary image also has 256x256x50. In this image, pixels that contain the streamlines get "1" and others get "0". Once the streamlines are converted to this binary image format, you can't edit anymore.<BR><BR>I think Hangyi will explain what exactly is 'xyzPtROI'.</DIV>
<DIV class=yiv1538504903gmail_extra><BR></DIV>
<DIV class=yiv1538504903gmail_extra>Susumu</DIV>
<DIV class=yiv1538504903gmail_extra><BR>
<DIV class=yiv1538504903gmail_quote>On Tue, Apr 24, 2012 at 4:12 AM, 李卫娜 <SPAN dir=ltr><<A href="http://cn.mc156.mail.yahoo.com/mc/compose?to=lwn_07@yahoo.com.cn" rel=nofollow target=_blank ymailto="mailto:lwn_07@yahoo.com.cn">lwn_07@yahoo.com.cn</A>></SPAN> wrote:<BR>
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<DIV>Dear mristudio users,</DIV>
<DIV> </DIV>
<DIV>In FAQ page, it says fiber coordinate represents image matrix units. But the fiber data I read out have some mixed decimals' coordinate (eg: x:54.00, y:38.78, z:1.62), is it right, shouldn't it be integers? What does it mean? </DIV>
<DIV> </DIV>
<DIV>Another question is where is the origin of the coordinates? The fiber data shows 'xyzPtROI x:0, y:0, z:0', where is this PtROI?</DIV>
<DIV> </DIV>
<DIV>Best regards,</DIV>
<DIV> </DIV>
<DIV>Weina Li</DIV></TD></TR></TBODY></TABLE><BR>_______________________________________________<BR>mristudio-users mailing list<BR><A href="http://cn.mc156.mail.yahoo.com/mc/compose?to=mristudio-users@mristudio.org" rel=nofollow target=_blank ymailto="mailto:mristudio-users@mristudio.org">mristudio-users@mristudio.org</A><BR><A href="http://lists.mristudio.org/mailman/listinfo/" rel=nofollow target=_blank>http://lists.mristudio.org/mailman/listinfo/</A><BR>Unsubscribe, send a blank email to: <A href="http://cn.mc156.mail.yahoo.com/mc/compose?to=mristudio-users-unsubscribe@mristudio.org" rel=nofollow target=_blank ymailto="mailto:mristudio-users-unsubscribe@mristudio.org">mristudio-users-unsubscribe@mristudio.org</A><BR><BR></BLOCKQUOTE></DIV><BR></DIV></DIV><BR>-----下面为附件内容-----<BR><BR>
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