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<p>Hello Kajal,</p>
<p>I can't really tell what could be wrong without knowing what was
in the simulation. From your data and the reconstructed image, it
looks like you simulate a line source at 1;-1 cm. Statistics are
very low though (1k counts), so it's difficult to say if there was
something wrong with the conversion or geometry. It doesn't look
like there are issues with the geometry from the sensitivity image
though. Perhaps you could check what do you get with a simulation
with higher statistics ?<br>
</p>
<p>Best regards,</p>
<p>Thibaut<br>
</p>
<br>
<div class="moz-cite-prefix">On 02/08/2017 11:09, Kajal Aggarwal
wrote:<br>
</div>
<blockquote
cite="mid:CAGb=JVjDu5qSn_7X6fF66uZWSXK7WZivNv12gALCXsX2MVLtEQ@mail.gmail.com"
type="cite">
<div dir="ltr">
<div>
<div>
<div>
<div>Hello,<br>
<br>
</div>
Thank you for the detailed explanation. I am having
troubles to reconstruct an image for a cylindrical PET
system simulated using Gate. I am generating .geom file
and .cdh and .cdf files (attached in this email) for my
.mac file and for the output root file. But the image
generated has some problem (see the screen-shot below).
Please guide me where I am going wrong. <br>
<br>
</div>
Thank you very much for all your support.<br>
<br>
</div>
Regards,<br>
</div>
Kajal<br>
<div>
<div>
<div>
<div><br>
<br>
<img src="cid:part1.5EC4CCA9.50EDBE08@univ-brest.fr"
alt="Inline image 1" height="190" width="560"><br>
<br>
<br>
<img src="cid:part2.BE3701F1.F32415F6@univ-brest.fr"
alt="Inline image 2" height="179" width="560"> <br>
</div>
</div>
</div>
</div>
</div>
<div class="gmail_extra"><br>
<div class="gmail_quote">On Tue, Aug 1, 2017 at 9:00 PM, tmerlin
<span dir="ltr"><<a moz-do-not-send="true"
href="mailto:Thibaut.Merlin@univ-brest.fr" target="_blank">Thibaut.Merlin@univ-brest.fr</a>></span>
wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0
.8ex;border-left:1px #ccc solid;padding-left:1ex">
<div bgcolor="#FFFFFF" text="#000000">
<p>Hello Kajal,</p>
<p>F.O.V variables are arbitrary computed as <i>scanner_radius(mm)</i><i>/4</i>
for the transaxial component, and the axial dimension
(mm) of the rsector/block for the axial component. The
transaxial/axial number of voxels are calculated from
these values in order to get (large) isotropic 4mm
voxels.<br>
</p>
<p>The sole purpose of these variables is to be used as
default for reconstruction dimensions/voxel sizes when
using this scanner, in the case no dimensions have been
initialized in command-line options. In practice, they
are overwritten by the parameters entered in command
line options (<i>-dim</i> for number of voxels, <i>-fov
/-vox</i> for field of view and voxel dimensions
initializations ).</p>
<p>Best regards,</p>
<p>Thibaut<br>
</p>
<div>
<div class="h5"> <br>
<div class="m_3382528311770357868moz-cite-prefix">On
01/08/2017 16:54, Kajal Aggarwal wrote:<br>
</div>
</div>
</div>
<blockquote type="cite">
<div>
<div class="h5">
<div dir="ltr">
<div>Hello everyone,<br>
<br>
</div>
I am trying to create .geom file from a .mac file
for PET scanner system. In the .geom file created,
I would like to know how the voxels number
transaxial, voxels number axial, field of view
transaxial, field of view axial are being
calculated.<br>
<br>
<br>
<br clear="all">
<div>
<div><br>
-- <br>
<div
class="m_3382528311770357868gmail_signature">
<div dir="ltr">
<div>Thanking you.</div>
<div> </div>
<div>Yours sincerely,</div>
<div>Kajal Aggarwal</div>
</div>
</div>
</div>
</div>
</div>
<br>
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class="m_3382528311770357868mimeAttachmentHeader"></fieldset>
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<pre class="m_3382528311770357868moz-signature" cols="72">--
Thibaut MERLIN -- PhD
Docteur en Imagerie Médicale au Laboratoire de Traitement de l'Information Medicale (LaTIM - INSERM UMR 1101)
Bâtiment 1
CHRU Morvan - 2, Av. Foch
29609 Brest CEDEX - FRANCE
Tel: 06.75.12.24.90</pre>
</font></span></div>
</blockquote></div>
--
<div class="gmail_signature" data-smartmail="gmail_signature"><div dir="ltr"><div>Thanking you.</div><div> </div><div>Yours sincerely,</div><div>Kajal Aggarwal</div></div></div>
</div>
</blockquote>
<pre class="moz-signature" cols="72">--
Thibaut MERLIN -- PhD
Docteur en Imagerie Médicale au Laboratoire de Traitement de l'Information Medicale (LaTIM - INSERM UMR 1101)
Bâtiment 1
CHRU Morvan - 2, Av. Foch
29609 Brest CEDEX - FRANCE
Tel: 06.75.12.24.90</pre></body></html>