These axis definitions are very confusing. If you are asking to get a correct gradient table, I recommend you to use Jon Farrell's gradient table calculator for Philips scanners. <br><br><div class="gmail_quote">On Thu, Sep 23, 2010 at 1:14 PM, [Seongjin] <span dir="ltr"><<a href="mailto:choisj70@gmail.com">choisj70@gmail.com</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex;">Thanks for your reply.<br><br>One question about the I->S in Philips scanners.<br>I heard of that in Philips system +Z direction is S->I.<br>
I wonder if I am correct on this.<br><br>If that so, +X = R->L, +Y = A->P, +Z = S->I in Philips scanners. <br>
A bit deviation from LPS system regarding +z direction.<br><br>Sincerely,<br><font color="#888888">-Seongjin <br></font><div><div></div><div class="h5"><br><br><br><div class="gmail_quote">On Thu, Sep 23, 2010 at 12:49 PM, Hangyi Jiang <span dir="ltr"><<a href="mailto:hjiang@jhmi.edu" target="_blank">hjiang@jhmi.edu</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="margin:0pt 0pt 0pt 0.8ex;border-left:1px solid rgb(204, 204, 204);padding-left:1ex">hi,<br>
<br>
for axial slicing human brain, the X-Y-Z system is in LPS anatomical direction. or X = R->L, Y=A->P, Z=I->S;<br>
<br>
hangyi<br>
<br>
________________________________________<br>
From: <a href="mailto:mristudio-users-bounces@mristudio.org" target="_blank">mristudio-users-bounces@mristudio.org</a> [<a href="mailto:mristudio-users-bounces@mristudio.org" target="_blank">mristudio-users-bounces@mristudio.org</a>] On Behalf Of [Seongjin] [<a href="mailto:choisj70@gmail.com" target="_blank">choisj70@gmail.com</a>]<br>
Sent: Thursday, September 23, 2010 11:46 AM<br>
To: DTI Studio, ROI Editor, Landmarker Questions/Support<br>
Subject: [Mristudio-users] Coordinate system<br>
<div><div></div><div><br>
Dear all,<br>
<br>
Simple question about the coordinate system in the Philips Scanners.<br>
I would like to confirm the axis directions in terms of X-Y-Z coordinate system.<br>
<br>
I guess, the axis directions<br>
1) I-S(foot-to-head, inferior-to-superior) is "negative Z" direction<br>
2) A-P(anterior-to-posterior) is "negative Y" direction<br>
3) R-L(right-to-left) is "positive X" direction.<br>
<br>
If I knew this incorrectly, please correct my guess.<br>
<br>
Sincerely,<br>
-SC<br>
<br>
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