<table cellspacing="0" cellpadding="0" border="0" ><tr><td valign="top" style="font: inherit;">Hi Dženan,<br><br>Thanks for your input. I'm hoping to get a feeling on how to choose appropriate algorithms/filters for 3D non-equal spacing images in general. I was told that it would be more appropriate to perform 2D filters than 3D filters to the image I described in the first email (0.2 mm spacing along x, y, 1 mm spacing along z), because the spacing in z direction is five times of it along x and y. As I'm not an expert in image processing, I don't know if this is a common approach in the industry. I'm kind of hoping experts on this forum could give me some insights. Thank you again.<br><br>Regards,<br>Jay<br><br>--- On <b>Tue, 8/10/10, Dženan Zukić <i><dzenanz@gmail.com></i></b> wrote:<br><blockquote style="border-left: 2px solid rgb(16, 16, 255); margin-left: 5px; padding-left: 5px;"><br>From: Dženan Zukić
<dzenanz@gmail.com><br>Subject: Re: [Insight-users] How ITK handles non-equal spacing images<br>To: "Jay Li" <chyumm@yahoo.com><br>Cc: insight-users@itk.org<br>Date: Tuesday, August 10, 2010, 9:12 AM<br><br><div id="yiv845021485">Hi Jay,<div><br></div><div>ITK image has support for different spacings along each axis, unfortunately not all filters take this information into account (most should though). The best way to check is to take a look at the source code.</div>
<div><br></div><div>Regards,</div><div>Dženan<br><br><div class="yiv845021485gmail_quote">On Tue, Aug 10, 2010 at 02:54, Jay Li <span dir="ltr"><<a rel="nofollow" ymailto="mailto:chyumm@yahoo.com" target="_blank" href="/mc/compose?to=chyumm@yahoo.com">chyumm@yahoo.com</a>></span> wrote:<br><blockquote class="yiv845021485gmail_quote" style="margin: 0pt 0pt 0pt 0.8ex; border-left: 1px solid rgb(204, 204, 204); padding-left: 1ex;">
<table border="0" cellpadding="0" cellspacing="0"><tbody><tr><td style="font: inherit;" valign="top"><div>Dear ITK Users,</div>
<div> </div>
<div>I have a question regarding how ITK handles images with non-equal spacings in general. For example, I have a 3D volume with the spacing of 0.2 mm along X and Y axis respectively, but 1 mm spacing in Z direction. If I apply a 3-D level set segmentation algorithm to the image, is this going to be a concern due to the larger spacing in Z direction? Or instead should I try 2-D level set segmentation slice by slice on X-Y plane? Any suggestion is appreciated. Thank you.</div>
<div> </div>
<div>Regards,</div>
<div>Jay</div></td></tr></tbody></table><font color="#888888"><br>
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